psd311-b-90ui STMicroelectronics, psd311-b-90ui Datasheet - Page 55

• Manufacturer Part Number: psd311-b-90ui
• Description: Low Cost Field Programmable Microcontroller Peripherals
• Manufacturer: STMicroelectronics

Figure 28. Timing of 8-Bit Non-Multiplexed Address/Data Bus Using RD, WR (PSD3X1)
52
PSD3XX Family
PAD Input
RD/E as RD
WR/V PP or
R/W as WR
CSI/A19 as
Multiplexed
Active High
Active Low
as A0-A15
A15/AD15
PC0-PC2,
as I/O Pin
PA0-PA7
PB0-PB7
Direct
A0/AD0-
CSI/A19
See referenced notes on page 64.
as CSI
Inputs
Any of
ALE
ALE
(1)
1
2
3
STABLE INPUT
STABLE INPUT
7
6
5
6
4
8
READ CYCLE
18
12
INPUT
DATA VALID
9
32
32
10
19
13
1
2
STABLE INPUT
STABLE INPUT
11
36
14
WRITE CYCLE
3
15
14
32
32
12A
16
17
13
20
DATA
IN
OUTPUT