PSD813F2-A-70J STMicroelectronics, PSD813F2-A-70J Datasheet - Page 24

• Manufacturer Part Number: PSD813F2-A-70J
• Manufacturer: STMicroelectronics

Specifications of PSD813F2-A-70J

• Operating Temperature (max): 70C
• Operating Temperature (min): 0C
• Operating Temperature Classification: Commercial
• Package Type: PLCC
• Mounting: Surface Mount
• Pin Count: 52
• Lead Free Status / RoHS Status: Compliant

PSD register description and address offset
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PSD register description and address offset
Table 7
address. The CSIOP space is the 256 bytes of address that is allocated by the user to the
internal PSD registers.
The following section gives a more detailed description.
Table 7.
1. See
2. N/A = Not Applicable
Table 8.
8051XA (8-bit)
80C251 (page mode)
All other 8-bit multiplexed
8-bit non-multiplexed bus
Data In
Control
Data Out
Direction
Drive Select
Input
macrocell
Enable Out
Output
macrocells
AB
Output
macrocells
BC
Register
name
Section 16: I/O
shows the offset addresses to the PSD registers relative to the CSIOP base
MCU
I/O port latched address output assignments
Register address offset
Port A Port B Port C Port D
00
02
04
06
08
0A
0C
20
ports, on how to enable the Latched Address Output function.
01
03
05
07
09
0B
0D
20
21
Table 8
N/A
N/A
N/A
Address a3-a0
Port A (3:0)
10
12
14
16
18
1A
21
Doc ID 7833 Rev 7
provides brief descriptions of the registers in CSIOP space.
11
13
15
17
1B
Port A
Address a7-a4
N/A
Address a7-a4
N/A
Port A (7:4)
Other
(1)
Reads port pin as input, MCU I/O input
mode
Selects mode between MCU I/O or
Address Out
Stores data for output to port pins, MCU
I/O output mode
Configures port pin as input or output
Configures port pins as either CMOS or
Open Drain on some pins, while selecting
high slew rate on other pins.
Reads input macrocells
Reads the status of the output enable to
the I/O port driver
READ – reads output of macrocells AB
WRITE – loads macrocell flip-flops
READ – reads output of macrocells BC
WRITE – loads macrocell flip-flops
Address a11-a8
Address a11-a8
Address a3-a0
Address a3-a0
Port B (3:0)
(1)(2)
Description
Port B
N/A
Address a15-
a12
Address a7-a4
Address a7-a4
Port B (7:4)
PSD8XXFX