PSD853F5V90UI Ver la hoja de datos (PDF) - STMicroelectronics
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PSD853F5V90UI Datasheet PDF : 110 Pages
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PSD813F2, PSD833F2, PSD834F2, PSD853F2, PSD854F2
PSD REGISTER DESCRIPTION AND ADDRESS OFFSET
Table 6 shows the offset addresses to the PSD
registers relative to the CSIOP base address. The
CSIOP space is the 256 bytes of address that is al-
located by the user to the internal PSD registers.
Table 7 provides brief descriptions of the registers
in CSIOP space. The following section gives a
more detailed description.
Table 6. I/O Port Latched Address Output Assignments (Note1)
MCU
Port A
Port A (3:0)
Port A (7:4)
Port B
Port B (3:0)
Port B (7:4)
8051XA (8-bit)
N/A
Address a7-a4
Address a11-a8
N/A
80C251 (page mode)
N/A
N/A
Address a11-a8
Address a15-a12
All other 8-bit multiplexed
Address a3-a0
Address a7-a4
Address a3-a0
Address a7-a4
8-bit non-multiplexed bus
N/A
N/A
Address a3-a0
Address a7-a4
Note: 1. See the section entitled I/O PORTS, page 51, on how to enable the Latched Address Output function.
2. N/A = Not Applicable
Table 7. Register Address Offset
Register Name Port A Port B Port C Port D Other1
Description
Data In
00
01
10
11
Reads Port pin as input, MCU I/O input mode
Control
02
03
Selects mode between MCU I/O or Address Out
Data Out
04
05
12
13
Stores data for output to Port pins, MCU I/O
output mode
Direction
06
07
14
15
Configures Port pin as input or output
Drive Select
08
09
16
17
Configures Port pins as either CMOS or Open
Drain on some pins, while selecting high slew rate
on other pins.
Input Macrocell
0A
0B
18
Reads Input Macrocells
Enable Out
0C
0D
1A
1B
Reads the status of the output enable to the I/O
Port driver
Output Macrocells
AB
20
20
READ – reads output of macrocells AB
WRITE – loads macrocell flip-flops
Output Macrocells
BC
21
21
READ – reads output of macrocells BC
WRITE – loads macrocell flip-flops
Mask Macrocells AB 22
22
Blocks writing to the Output Macrocells AB
Mask Macrocells BC
23
23
Blocks writing to the Output Macrocells BC
Primary Flash
Protection
C0
Read only – Primary Flash Sector Protection
Secondary Flash
memory Protection
C2
Read only – PSD Security and Secondary Flash
memory Sector Protection
JTAG Enable
C7
Enables JTAG Port
PMMR0
B0
Power Management Register 0
PMMR2
B4
Power Management Register 2
Page
E0
Page Register
VM
E2
Places PSD memory areas in Program and/or
Data space on an individual basis.
Note: 1. Other registers that are not part of the I/O ports.
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