psd311-b-90ui STMicroelectronics, psd311-b-90ui Datasheet - Page 60

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

Figure 33. Timing of 16-Bit Non-Multiplexed Address/Data Bus Using RD, WR (PSD3X2/3X3)
RD/E/DS as RD
Multiplexed
PAD Input
See referenced notes on page 64.
WR/V
R/W as WR
BHE/PSEN
(High Byte)
Active High
Active Low
as A0-A15
(Low Byte)
A15/AD15
Inputs
PA0-PA7
PB0-PB7
Direct
A0/AD0-
CSI/A19
as BHE
PP
as CSI
ALE
ALE
or
(1)
(2)
1
2
3
STABLE INPUT
STABLE INPUT
7
6
5
6
4
READ CYCLE
8
12
DATA VALID
DATA VALID
9
32
32
10
13
1
2
STABLE INPUT
STABLE INPUT
36
14
WRITE CYCLE
3
15
11
14
32
32
12A
16
17
13
DATA
DATA
PSD3XX Family
IN
IN
57