psd311-b-90ui STMicroelectronics, psd311-b-90ui Datasheet - Page 56

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

Figure 29. Timing of 8-Bit Non-Multiplexed Address/Data Bus Using RD, WR (PSD3X2/3X3)
RD/E/DS as RD
Multiplexed
PAD Input
WR/V PP or
See referenced notes on page 64.
R/W as WR
Active High
Active Low
as A0-A15
A15/AD15
Inputs
as I/O Pin
PA0-PA7
PB0-PB7
Direct
CSI/A19
A0/AD0-
as CSI
Any of
ALE
ALE
(1)
(2)
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
PSD3XX Family
IN
OUTPUT
53