m21315 Mindspeed Technologies, m21315 Datasheet - Page 8

• Manufacturer Part Number: m21315
• Description: M21315 Hd/sd-sdi Auto-rate Reclocker W/4 1 Selector
• Manufacturer: Mindspeed Technologies

1.2.2
Table 1-1.
21315-DSH-001-B
XTL_OUT/XTL_OUT
XTL_IN/XTL_IN
IN_SEL[1:0]
Pin Name
RATE[2:0]
ARD_EN
177_L/O
SD/HD
LOL
Control/Interface/Low-Speed Pins (1 of 2)
Pin Descriptions
26,25,24
Pin #
52,53
50,51
18,17
21
27
28
33
Reference clock or crystal input. For GS1575B compatible operation, a
14.140 MHz series resonance crystal is required.
Reference frequency output for chained reclocker applications
Input control signal that selects the active high-speed serial input
00b: Select DDI0/DDI0
01b: Select DDI1/DDI1
10b: Select DDI2/DDI2
11b: Select DDI3/DDI3
Input control signal that enables Auto Rate Detect (ARD) functionality or
manual rate setting mode.
ARD_EN = High: Auto Rate Detector (ARD) enabled,
ARD_EN = Low: Manual rate selection mode
Bidirectional control signals used to indicate the data rate in ARD
enabled mode or to force a data rate setting in Manual mode
ARD_EN = High: RATE[2:0] pins indicate the date rate the M21315 is
locked to according to pin decoding shown below
ARD_EN = Low: RATE[2:0] pins are used to force a particular data rate
according to the pin decoding shown below.
RATE[2:0] = 000: 143 Mbps data rate
RATE[2:0] = 001: 177 Mbps data rate
RATE[2:0] = 010: 270 Mbps data rate
RATE[2:0] = 011: 360 Mbps data rate
RATE[2:0] = 100: 540 Mbps data rate
RATE[2:0] = 101: 1483.5/1485 Mbps data rate
Input control signal used to lock out the 177Mbps data rate from the
ARD search order sequences. This signal is mainly for drop-in
compatibility with the GS1535 as the M21315 locks correctly with DVB-
ASI data.
177_L/O = High: 177 Mbps data rate locked out from ARD search order
177_L/O = Low: 177 Mbps data rate included in ARD search order
Output Status indication signal for reclocker Loss of Lock. See the
Frequency Acquisition section for more detailed information.
LOL = High: Reclocker PLL is locked
LOL = Low: Reclocker PLL is not locked
Output status indication signal to control slew rate of downstream cable
driver.
SD/HD = High: Reclocker locked to a SD data rate (143-540 Mbps)
SD/HD = Low: Reclocker locked to a HD rate (1.4835/1.485 Gbps)
Mindspeed Technologies
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Function
®
Functional Description
Internal pull down
Internal pull down
Internal pull up
Internal pull up
Internal pull up
Default
—
—
—
O-Analog
I-Analog
O-CMOS
O-CMOS
I-CMOS
I-CMOS
I-CMOS
CMOS
Type
I/O-
2