psd311-b-90ui STMicroelectronics, psd311-b-90ui Datasheet - Page 16

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

Figure 4.
PAD Description
NOTES: 1. CSI is a power-down signal. When high, the PAD is in stand-by mode and all its outputs
WR or R/W
*
ALE or AS
SRAM no available on “R” versions
RD/E/DS
A19
A18
A17
A16
A15
A14
A13
A12
A11
CSI
RESET
P
P
P
P
3
2
1
0
2. RESET deselects all PAD output signals. See Tables 10 and 11.
3. A18, A17, and A16 are internally multiplexed with CS10, CS9, and CS8, respectively.
4. P
5. DS is not available on 3X1 devices.
become non-active. See Tables 12 and 13.
Either A18 or CS10, A17 or CS9, and A16 or CS8 can be routed to the external pins of
Port C. Port C pins can be configured as either input or output, individually.
0
–P
3
are not included on 3X1 devices.
ES0
ES1
ES2
ES3
ES4
ES5
ES6
ES7
RS0
CSIOPORT
CSADIN
CSADOUT1
CSADOUT2
8 EPROM BLOCK
SELECT LINES
SRAM BLOCK SELECT
CS0/PB0
CS1/PB1
CS2/PB2
CS3/PB3
CS4/PB4
CS5/PB5
CS6/PB6
CS7/PB7
CS8/PC0
CS9/PC1
CS10/PC2
I/O BASE ADDRESS
TRACK MODE
CONTROL SIGNALS
PSD3XX Family
*
PAD
PAD
A
B
13