GMS81C7216 Datasheet, PDF (37/121 Pages) List of Unclassifed Manufacturers – 8-BIT SINGLE-CHIP MICROCONTROLLERS

GMS81C7208/7216
In addition, port R2 is multiplexed with analog input port.
Port Pin
R21
R22
R23
Alternate Function
AN1 (Analog Input 1)
AN2 (Analog Input 2)
AN3 (Analog Input 3)
R2 Data Register
R2
---
ADDRESS: 0C2_H
RESET VALUE: 00_H
- R23 R22 R21 -
Input / Output Data
R2 Direction Register
R2DD ^{- - - -}
ADDRESS: 0CA_H
RESET VALUE: 00_H
-
Port Direction
0: Input
1: Output
R2 Pull-up Register
R2PU - - - -
ADDRESS: 0D2_H
RESET VALUE: 00_H
-
Port Pull-up
0: Pull-up Resistor Off
1: Pull-up Resistor On
R2 Open Drain Control Register ^{ADDRESS: 0D6H}
RESET VALUE: 00_H
R2CR ^{- - - -}
-
Port Open Drain
0: Push Pull
1: Open Drain
R3 and R3DD Register: R3 is an 1-bit CMOS bidirectional I/O
port (address 0C3_H). Each I/O pin can independently used as an
input or an output through the R3DD register (address 0CB_H).
Each port also can be set individually as pull-up port through the
R3PU (address 0D3_H), and as open drain register through the
R3CR (address 0D7_H).
In addition, port R3 is multiplexed with various special features.
Port Pin
R30
Alternate Function
BUZ (Buzzer driving output)
R3 Data Register
ADDRESS: 0C3_H
RESET VALUE: 00_H
R3
- - - - - - - R30
Input / Output data
R3 Direction Register
R3DD ^{- - - -}
ADDRESS: 0CB_H
RESET VALUE: 00_H
---
Port Direction
0: Input
1: Output
R3 Pull-up Register
R3PU ^{- - - -}
ADDRESS: 0D3_H
RESET VALUE: 00_H
---
Port Pull-up
0: Pull-up Resistor Off
1: Pull-up Resistor On
R3 Open Drain Control Register ^{ADDRESS: 0D7H}
RESET VALUE: 00_H
R3CR ^{- - - - - - -}
Port Open Drain
0: Push Pull
1: Open drain
FEB. 2005 Ver 1.04
33