psd311-b-90ui STMicroelectronics, psd311-b-90ui Datasheet - Page 59

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

Figure 32. Timing of 16-Bit Non-Multiplexed Address/Data Bus Using RD, WR (PSD3X1)
56
PSD3XX Family
PAD Input
RD/E as RD
WR/V
R/W as WR
BHE/PSEN
CSI/A19 as
Multiplexed
(High Byte)
Active High
Active Low
(Low Byte)
as A0-A15
A15/AD15
PC0-PC2,
See referenced notes on page 64.
PA0-PA7
PB0-PB7
Direct
CSI/A19
A0/AD0-
as BHE
as CSI
Inputs
PP
ALE
ALE
(1)
or
1
2
3
STABLE INPUT
STABLE INPUT
7
6
6
4
READ CYCLE
8
12
DATA VALID
DATA VALID
9
9
32
32
10
13
1
2
STABLE INPUT
STABLE INPUT
14
WRITE CYCLE
3
15
11
36
14
32
12A
32
16
17
13
DATA
DATA
IN
IN