CS4953xx Data Sheet

32-bit Audio Decoder DSP Family

DS705F2

21

5.15 Switching Characteristics — Parallel Control Port - Motorola Slave Mode

Parameter

Symbol

Min

Typical

Max

Unit

Address setup before PCP_CS and PCP_DS low

5—

—

ns

Address hold time after PCP_CS and PCP_DS low

5—

—

ns

Read

Delay between PCP_DS then PCP_CS low or PCP_CS then

PCP_DS# low

0—

—

ns

Data valid after PCP_CS and PCP_DS low with PCP_R/W high

—

—

19

ns

PCP_CS and PCP_DS low for read

24

—

—

ns

Data hold time after PCP_CS or PCP_DS high after read

8—

—

ns

Data high-Z after PCP_CS or PCP_DS high after read

—

—

18

ns

PCP_CS or PCP_DS high to PCP_CS and PCP_DS low for next

1. The system designer should be aware that the actual maximum speed of the communication port may be limited by

the firmware application. Hardware handshaking on the PCP_BSY pin/bit should be observed to prevent overflowing

the input data buffer. AN288 CS4953xx/CS497xxx Firmware User’s Manual should be consulted for the firmware

speed limitations.

30

—

—

ns

PCP_CS or PCP_DS high to PCP_CS and PCP_DS low for next

write1

30

—

—

ns

PCP_RW rising to PCP_IRQ falling

—

—

12

ns

Write

Delay between PCP_DS then PCP_CS low or PCP_CS then

PCP_DS low

0—

—

ns

Data setup before PCP_CS or PCP_DS high

8—

—

ns

PCP_CS and PCP_DS low for write

24

—

—

ns

PCP_R/W setup before PCP_CS AND PCP_DS low

24

—

—

ns

PCP_R/W hold time after PCP_CS or PCP_DS high

8—

—

ns

Data hold after PCP_CS or PCP_DS high

8—

—

ns

PCP_CS or PCP_DS high to PCP_CS and PCP_DS low with

PCP_R/W high for next read1

30

—

—

ns

PCP_CS or PCP_DS high to PCP_CS and PCP_DS low for next

write1

30

—

—

ns

PCP_RW rising to PCP_BSY falling

—

2*DCLKP + 20

—

ns