C8051F989-GUR Silicon Labs, C8051F989-GUR Datasheet - Page 231

• Manufacturer Part Number: C8051F989-GUR
• Description: 8-bit Microcontrollers - MCU 4kB 512B RAM
• Manufacturer: Silicon Labs

Specifications of C8051F989-GUR

• Rohs: yes
• Core: 8051
• Data Bus Width: 8 bit
• Processor Series: C8051

SFR Definition 21.17. P1DRV: Port1 Drive Strength
SFR Page = 0xF; SFR Address = 0xA5
SFR Definition 21.18. P2: Port2
SFR Page = All; SFR Address = 0xA0; Bit-Addressable
Name
Reset
Name
Reset
Type
Bit
7:0
Type
6:0
Bit
Bit
Bit
7
P1DRV[7:0]
Name
Unused
Name
R/W
P2
P2
7
0
7
1
Drive Strength Configuration Bits for
Configures digital I/O Port cells to high or low output drive strength.
0: Corresponding P1.n Output has low output drive strength.
1: Corresponding P1.n Output has high output drive strength.
Port 2 Data.
Sets the Port latch logic
value or reads the Port pin
logic state in Port cells con-
figured for digital I/O.
Read = 0000000b; Write = Don’t Care.
6
0
6
0
Description
5
0
5
0
Rev. 1.1
4
0
4
0
0: Set output latch to logic
LOW.
1: Set output latch to logic
HIGH.
P1DRV[7:0]
R/W
C8051F99x-C8051F98x
P1.7–P1.0 (respectively).
Function
Read
3
0
3
0
2
0
2
0
0: P2.7 Port pin is logic
LOW.
1: P2.7 Port pin is logic
HIGH.
1
0
1
0
Write
0
0
0
0
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