RPIXP2850BB Intel, RPIXP2850BB Datasheet - Page 140

• Manufacturer Part Number: RPIXP2850BB
• Manufacturer: Intel

Specifications of RPIXP2850BB

• Operating Supply Voltage (typ): 1.3/1.5/2.5/3.3V
• Operating Supply Voltage (max): 1.575/2.7/3.465V
• Operating Supply Voltage (min): 1.235/2.3/3.135V
• Mounting: Surface Mount
• Operating Temperature (max): 70C
• Operating Temperature (min): 0C
• Operating Temperature Classification: Commercial
• Lead Free Status / Rohs Status: Not Compliant

IXP28XX Network Processor
Slowport
Figure 85.
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Note: The IXP28XX CSR Transmit Enable Register (SP_TXE) can be used to delay the data and relevant
Mode 3 32-Bit Write Transfer
To pack the 32-bit write data, the IXP28XX network processor drives a byte of write data onto the
SP_AD bus in four cycles that are qualified with the rising edge of the SP_CP signal, with the
SP_OE_L && SP_DIR signal being active, i.e., SP_OE_L = 0 and SP_DIR = 1. On every rising
edge of the SP_CP signal with SP_OE_L && SP_DIR asserted, the data is shifted into a register
implemented in the glue logic device – from least significant byte (LSB) through most significant
byte (MSB).
Slowport signals in relation to the SP_CLK. For programming information, refer to the Intel®
IXP2800 Network Processor Hardware Reference Manual.
SP_CS_L[1:0]
SP_AD[7:0]
SP_ACK_L
SP_ALE_L
SP_WR_L
SP_OE_L
SP_RD_L
SP_CLK
SP_DIR
SP_CP
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2
0
3
3
Hardware Design Guide
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