VSC7217UC Vitesse Semiconductor Corp., VSC7217UC Datasheet
VSC7217UC
Specifications of VSC7217UC
Related parts for VSC7217UC
VSC7217UC Summary of contents
Page 1
Preliminary Datasheet VSC7217 Features • 4 ANSI X3T11 Fibre Channel and IEEE 802.3z Gigabit Ethernet Compliant Trans- ceivers • Over 8 Gb/s Duplex Raw Data Rate • Redundant PECL Tx Outputs and Rx Inputs • 8B/10B Encoder/Decoder per Channel, Optional ...
Page 2
Mutli-Gigabit Interconnect Chip General Description The VSC7217 is a quad 8-bit parallel-to-serial and serial-to-parallel transceiver chip used for high band- width interconnection between busses, backplanes, or other subsystems. Four Fibre Channel and Gigabit Ether- net compliant transceivers provide up to ...
Page 3
Preliminary Datasheet VSC7217 Transmitter Functional Description Transmitter Data Bus Each VSC7217 transmit channel has an 8-bit input transmit data character, Tn(7:0), and two control inputs, C/Dn and WSENn. The C/Dn input determines whether a normal data character or a special ...
Page 4
Mutli-Gigabit Interconnect Chip mit data rate that is locked to the selected input timing source. This is an especially important when DUAL is HIGH and input timing is referenced to REFCLK, since the falling edge is NOT used. The internal ...
Page 5
Preliminary Datasheet VSC7217 8B/10B Encoder Each channel contains an 8B/10B encoder which translates the 8-bit input data on Tn(7:0) into a 10-bit encoded data character. C/Dn inputs are also provided in each channel which, along with KCHAR, allow the transmission ...
Page 6
Mutli-Gigabit Interconnect Chip four transmit channel inputs for serialization will be transferred on the receive channel parallel outputs. The Word Sync Sequence provides a unique synchronization point in the serial data stream that is used to align the receive channels. ...
Page 7
Preliminary Datasheet VSC7217 mary or redundant serial input as the data source for that channel. When RXP/RC is HIGH, the C channel serial data source is PRXC. When LBENn(1:0)=10, the channel’s transmitter is looped back and becomes the serial data ...
Page 8
Mutli-Gigabit Interconnect Chip Deserializer and Character Alignment The retimed serial data stream is converted into 10-bit characters by the deserializer. A special 7-bit “Comma” pattern (‘0011111xxx’ or ‘1100000xxx’) is recognized by the receiver and allows it to identify the 10-bit ...
Page 9
Preliminary Datasheet VSC7217 The VSC7217 presents recovered data on Rn(7:0) and status on IDLEn, KCHn and ERRn. These outputs are timed either to each channel’s own recovered clock (RCLKn/RCLKNn), to Channel A’s recovered clock (RCLKA/RCLKNA REFCLK. The output ...
Page 10
Mutli-Gigabit Interconnect Chip REFCLK (DUAL = 0) REFCLK (DUAL = 1) Rn(7:0) IDLEn KCHn ERRn RCLKn (DUAL = 0) RCLKn (DUAL = 1) Rn(7:0) IDLEn KCHn ERRn The data coming from the decoder is clocked into the elastic buffer by ...
Page 11
Preliminary Datasheet VSC7217 The elastic buffer is designed to allow a maximum phase drift serial clock bit times between re- synchronizations, which sets a limit on the maximum data “packet” length allowed between IDLEs. This maxi- ...
Page 12
Mutli-Gigabit Interconnect Chip Word Sync Sequence will be properly word-aligned. In the process of channel alignment, one or two of the final twelve K28.5 characters in the Word Sync Sequence may be deleted or duplicated. This ensures that each trans- ...
Page 13
Preliminary Datasheet VSC7217 If the transmitting devices’ REFCLKs are not frequency locked to the receiving devices’ REFCLKs, IDLEs will have to be added to or dropped from all the channels at the same time. In order to implement this, one ...
Page 14
Mutli-Gigabit Interconnect Chip entered whenever four consecutive invalid transmissions have been detected or when the occurrences of invalid transmission outnumber those of valid transmission by four. The relative occurrences of invalid vs. valid trans- missions are monitored with a simple ...
Page 15
Preliminary Datasheet VSC7217 Link Status Outputs The receiver ERRn, KCHn and IDLEn outputs indicate status for each channel as shown below in Table 7. Since this status is encoded, multiple conditions could occur simultaneously so the states are prioritized as ...
Page 16
Mutli-Gigabit Interconnect Chip Loopback Operation Loopback control pins, LBENn(1:0), are provided in each channel to internally loopback data paths for on- chip diagnosis. Both serial and parallel loopback functions are provided. Table 8: Loopback Mode Selection LBENn(1:0) Loopback Mode 0 ...
Page 17
Preliminary Datasheet VSC7217 Figure 11: Parallel Loopback Mode Operation LBENn(1:0) RXP/Rn LBTXn Clk/Data PRXn+ Recovery PRXn- RRXn+ RRXn- PSDETn RSDETn RECEIVER BIST PTXENn 1 8 Gen 8B/10B Tn(7:0) Encode C/Dn 0 WSENn RTXENn REFCLK 0 1 ...
Page 18
Mutli-Gigabit Interconnect Chip Compatibility with VSC7214 and VSC7211 Care has been taken in the functional definition of the VSC7217 ensure compatiblity with the VSC7211 and VSC7214 at the serial link level, and that the transmitter and receiver low-speed interfaces have ...
Page 19
Preliminary Datasheet VSC7217 VSC7214 MODE 1: RCLKEN=LOW, FLOCK=LOW, INDEP=HIGH Receiver Rn(7:0), ERRn, KCHn and IDLEn outputs are synchronous to REFCLK, IDLE insertion/dele- tion is enabled, and the receive channels are independent. The VSC7217 should be configured with RMODE(1:0)=00, FLOCK=0, and ...
Page 20
Mutli-Gigabit Interconnect Chip AC Specifications Figure 13: Transmit Input Timing Waveforms with TMODE = 000 REFCLK (DUAL=0) REFCLK (DUAL=1) Internal Clock (from PLL) Tn(7:0) C/Dn WSENn Figure 14: Transmit Input Timing Waveforms with TMODE = 10X TBCn (or TBCA) Internal ...
Page 21
Preliminary Datasheet VSC7217 Figure 15: Transmit Input Timing Waveforms with TMODE = 11X (“ASIC-Friendly” Timing) TBCn (or TBCA) Internal Clock (from PLL) Tn(7:0) C/Dn WSENn Table 10: Transmit Input AC Characteristics with TMODE = 11X Parameters Description Input Skew relative ...
Page 22
Mutli-Gigabit Interconnect Chip Figure 17: Receive Output Timing Waveforms with RMODE = REFCLK (DUAL = 0) REFCLK (DUAL = 1) Rn(7:0) TBERRn KCHn IDLEn ERRn PSDETn RSDETn Table 12: Receive Output AC Characteristics with RMODE = 00 ...
Page 23
Preliminary Datasheet VSC7217 Figure 19: RCLKn and RCLKNn Timing Waveforms with DUAL = 1 RCLKn RCLKNn Table 14: General Receive AC Characteristics Parameters Description Delay Between Rising Edge T of RCLKn to Rising Edge 3 of RCLKNn RCLKn to RCLKNn ...
Page 24
Mutli-Gigabit Interconnect Chip REFCLK Table 15: Reference Clock Requirements Parameters Description FR Frequency Range FO Frequency Offset DC REFCLK Duty Cycle T ,T REFLCK and TBC Pulse Width REFCLK Rise and Fall Times RCR RCF REFCLK ...
Page 25
Preliminary Datasheet VSC7217 Figure 21: Parametric Measurement Information Serial Input Rise and Fall Time T r Receiver Input Eye Diagram Jitter Tolerance Mask Serial Output Load G52325-0, Rev. 3.0 6/14/00 741 Calle Plano, Camarillo, CA 93012 ...
Page 26
Mutli-Gigabit Interconnect Chip DC Characteristics Parameters Description TTL Outputs (Rn(7:0), KCHn, IDLEn, ERRn, RCLKn/RCLKNn, TBERRn, PSDETn, RSDETn, WSO) V TTL Output HIGH Voltage OH V TTL Output LOW Voltage OL I TTL Output Leakage Current OZ TTL Inputs (TBCn, Tn(7:0), ...
Page 27
Preliminary Datasheet VSC7217 Absolute Maximum Ratings Power Supply Voltage, (any V PECL Differential Input Voltage............................................................................................ -0. TTL Input Voltage...........................................................................................................................-0.5V to +5.5V TTL Output Voltage .............................................................................................................. -0. TTL Output Current ...................................................................................................................................... 50mA PECL Output Current .................................................................................................................................... 50mA ...
Page 28
Mutli-Gigabit Interconnect Chip Table 16: Pin Table Page 28 741 Calle Plano, Camarillo, CA 93012 • 805/388-3700 • FAX: 805/987-5896 VITESSE SEMICONDUCTOR CORPORATION VITESSE SEMICONDUCTOR CORPORATION Preliminary Datasheet VSC7217 G52325-0, Rev. 3.0 6/14/00 ...
Page 29
Preliminary Datasheet VSC7217 Table 17: Pin Description Pin Name I/O 6Y, 8U, 7W, 5Y, I 7V, 7U, TA(7:0) 6W, 5W 11U, 11W, 10Y, 10W, I 10U, 10V, TB(7:0) 9Y, 9W 12A, 11C, 11D, 10A, I 10B, 10D, TC(7:0) 10C, 9A ...
Page 30
Mutli-Gigabit Interconnect Chip Pin Name I/O 1R, 2R PTXA+/- 1M, 2M PTXB+/- O 1J, 2J PTXC+/- 1F, 2F PTXD+/- 1T, 2T RTXA+/- 1N, 2N RTXB+/- O 1H, 2H RTXC+/- 1E, 2E RTXD+/- 4N PTXENA 4M PTXENB I 4J PTXENC 4H ...
Page 31
Preliminary Datasheet VSC7217 Pin Name I/O 18N ERRA 16U ERRB O 20A ERRC 20F ERRD 20M RCLKA 19M RCLKNA 17T RCLKB 20Y RCLKNB O 18E RCLKC 17E RCLKNC 17K RCLKD 18K RCLKND 6U RMODE0 I 4W RMODE1 1U, 2U PRXA+/- ...
Page 32
Mutli-Gigabit Interconnect Chip Pin Name I/O 8A REFCLKP I 9D REFCLKN 1K CAP0 1L CAP1 5U DUAL I 13W FLOCK I 12D BIST I 12V ENDEC I 12U RESETN I 20L WSI I 17L WSO O 15A TCK I 13B ...
Page 33
Preliminary Datasheet VSC7217 Pin Name I/O 11A, 13C, 13U, 19L, 3C, 3K, 3V, VSSD 4C, 4E, 4T, 4V, 6V, 7A, 7C, 8W 14B, 14W, 17B, 17D, 17H, 17P, 17U, 17W, VDDT 18L, 19B, 19E, 19G, 19J, 19N, 19T, 19W 14C, ...
Page 34
Mutli-Gigabit Interconnect Chip Package Thermal Considerations The VSC7217 is packaged in a 256-pin, 27mm, thermally enhanced BGA in a 20x20 array which offers excellent electrical characteristics, good thermal performance and small size. This package uses an industry- standard footprint. The ...
Page 35
Preliminary Datasheet VSC7217 Package Information 1.27 Typ 27.0 BOTTOM VIEW G52325-0, Rev. 3.0 6/14/00 741 Calle Plano, Camarillo, CA 93012 • 805/388-3700 • FAX: 805/987-5896 VITESSE SEMICONDUCTOR CORPORATION 256-pin BGA ...
Page 36
... Vitesse Semiconductor Corporation’s products are not intended for use in life support appliances, devices or systems. Use of a Vitesse product in such applications without the written consent is prohibited. Page 36 741 Calle Plano, Camarillo, CA 93012 • 805/388-3700 • FAX: 805/987-5896 VITESSE SEMICONDUCTOR CORPORATION xx VSC7217 VSC7217UC ####AAAA VITESSE VITESSE SEMICONDUCTOR CORPORATION Preliminary Datasheet VSC7217 Package UC: 256-Pin, 27mm BGA ...