psd311-b-90ui STMicroelectronics, psd311-b-90ui Datasheet - Page 14

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

8.0
Operating Modes
(MCU
Configurations)
(cont.)
Figure 3C. Connecting a PSD3XX to an 8-Bit Non-Multiplexed-Bus MCU
Figure 3D. Connecting a PSD3XX to a 16-Bit Non-Multiplexed-Bus MCU
Figure 3A. Connecting a PSD3XX to an 8-Bit Multiplexed-Bus MCU
Figure 3B. Connecting a PSD3XX to a 16-Bit Multiplexed-Bus MCU
NOTES: 1. DS is a valid input on 3X2/3X3 and devices only.
2. Connect A16-A18 to Port C if your MCU outputs more than 16 bits of address.
16-bit
16-bit
MCU
Your
MCU
Your
Your
MCU
8-bit
Your
MCU
8-bit
R/ W or WR
R/ W or WR
R/ W or WR
R/ W or WR
BHE/ PSEN
BHE / PSEN
AD8 -AD15
RD/E / DS
RD/E / DS
RD/E / DS
AD0 -AD7
RD/E / DS
AD0 -AD7
A19 / CSI
A19/ CSI
A19/ CSI
A16-A18
A16-A18
A19/ CSI
A16-A18
A16-A18
ALE/AS
ALE/AS
ALE/AS
ALE/AS
A0-A15
D0 -D15
A8 -A15
RESET
RESET
A0-A15
RESET
D0-D7
RESET
PSEN
PSEN
2
1
2
1
1
2
1
2
PSD3XX
PSD3XX
PSD3XX
PSD3XX
PB
PC
PA
PB
PC
PA
PB
PC
PA
PA
PB
PC
D8-D15
D0 -D7
PSD3XX Family
11