UPSD3254 STMICROELECTRONICS [STMicroelectronics], UPSD3254 Datasheet - Page 38

• Manufacturer Part Number: UPSD3254
• Description: Flash Programmable System Devices with 8032 Microcontroller Core
• Manufacturer: STMICROELECTRONICS [STMicroelectronics]

UPSD3254A, UPSD3254BV, UPSD3253B, UPSD3253BV
Table 17. PSD Module Register Address Offset
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CSIOP
Offset
Addr
0A
0C
0B
0D
1A
1B
00
02
04
06
08
01
03
05
07
09
10
12
14
16
18
13
15
17
20
11
Data Out (Port A)
Direction (Port A)
Data Out (Port B)
Direction (Port B)
Data Out (Port C)
Direction (Port C)
Data Out (Port D)
Direction (Port D)
Register Name
Data In (Port A)
Control (Port A) Configure pin between I/O or Address Out Mode. Bit = 0 selects I/O
Data In (Port B)
Control (Port B)
Data In (Port C)
Data In (Port D)
Input Macrocell
Input Macrocell
Input Macrocell
Macrocells AB
Drive (Port C)
Drive (Port D)
Drive (Port A)
Drive (Port B)
Enable Out
Enable Out
Enable Out
Enable Out
(Port A)
(Port A)
(Port B)
(Port B)
(Port C)
(Port C)
(Port D)
Output
Configures Port pin between CMOS, Open Drain or Slew rate. Bit =
Reads the status of the output enable control to the Port pin driver.
7
*
*
*
*
*
Configures Port pin as input or output. Bit = 0 selects input
Latched data for output to Port pins, I/O Output Mode
6
*
*
*
*
*
Reads latched value on Input Macrocells
Bit = 0 indicates pin is in input mode.
Reads Port pins as input
5
*
*
*
*
*
Bit Register Name
0 selects CMOS
4
*
*
*
*
*
3
*
*
*
*
*
2
1
*
*
*
*
*
0
Reset
Value
00
00
00
00
00
00
00
00
00
00
00
00
00
00
Only Bit 1 and
Only Bit 1 and
Only Bit 1 and
Only Bit 1 and
Only Bit 1 and
Comments
2 are used
2 are used
2 are used
2 are used
2 are used