User Manual

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
t
mas
5——ns
Address hold time after PCP_CS and PCP_DS low
t
mah
5——ns
Read
Delay between PCP_DS then PCP_CS low or PCP_CS then
PCP_DS# low
t
mcdr
0——ns
Data valid after PCP_CS and PCP_DS low with PCP_R/W high
t
mdd
— — 19 ns
PCP_CS and PCP_DS low for read
t
mrpw
24 — — ns
Data hold time after PCP_CS or PCP_DS high after read
t
mdhr
8——ns
Data high-Z after PCP_CS or PCP_DS high after read
t
mdis
— — 18 ns
PCP_CS or PCP_DS high to PCP_CS and PCP_DS low for next
read
1
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.
t
mrd
30 — — ns
PCP_CS or PCP_DS high to PCP_CS and PCP_DS low for next
write
1
t
mrdtw
30 — — ns
PCP_RW rising to PCP_IRQ falling
t
mrwirqh
— — 12 ns
Write
Delay between PCP_DS then PCP_CS low or PCP_CS then
PCP_DS low
t
mcdw
0——ns
Data setup before PCP_CS or PCP_DS high
t
mdsu
8——ns
PCP_CS and PCP_DS low for write
t
mwpw
24 — — ns
PCP_R/W setup before PCP_CS AND PCP_DS low
t
mrwsu
24 — — ns
PCP_R/W hold time after PCP_CS or PCP_DS high
t
mrwhld
8——ns
Data hold after PCP_CS or PCP_DS high
t
mdhw
8——ns
PCP_CS or PCP_DS high to PCP_CS and PCP_DS low with
PCP_R/W high for next read
1
t
mwtrd
30 — — ns
PCP_CS or PCP_DS high to PCP_CS and PCP_DS low for next
write
1
t
mwd
30 — — ns
PCP_RW rising to PCP_BSY falling
t
mrwbsyl
— 2*DCLKP + 20 — ns