IDT88P8344 Datasheet, PDF (85/98 Pages) Integrated Device Technology – SPI EXCHANGE 4 x SPI-3 TO SPI-4 Issue 1.0

IDT88P8344 SPI EXCHANGE 4 x SPI-3 TO SPI-4
INDUSTRIAL TEMPERATURE RANGE
11.6.6.1 Microprocessor parallel port AC timing
specifications
Be sure to connect SPI_EN to a logic low when using the parallel µP interface
mode.
Read cycle specification Motorola non-multiplexed (MPM=0)
tRC
tDW
tRecovery
DSB + CSB
R/WB
ADD[5:0]
tRWV
tRWH
tADH
tAV
Valid Address
tPRD
tDAZ
READ DBUS[7:0]
Valid Data
6370 drw07
Figure 37. Microprocessor parallel port Motorola read timing diagram
TABLE 138 – MICROPROCESSOR PARALLEL PORT MOTOROLA READ TIMING
Symbol Parameter
MIN MAX Unit
T
Internal main clock period (MCLK)
80 100 MHz
tRC
Read cycle time
5.5T+25
ns
tDW
Valid DSB width
5.5T+20
ns
tRWV
Delay from DSB to valid read signal
T/2-4 ns
tRWH
R/WB to DSB hold time
2T+10
ns
tAV
Delay from DSB to Valid Address
T/2-4 ns
tADH
Address to DSB hold time
2T+10
ns
tRPD
DSB to valid read data propagation delay
5.5T+20 ns
tDAZ
Delay from read data active to high Z
12
ns
tRecovery Recovery time from read cycle
5
ns
85
APRIL 10, 2006