HMS87C1304A Datasheet, PDF (32/70 Pages) Hynix Semiconductor – CMOS SINGLE-CHIP 8-BIT MICROCONTROLLER

HMS87C1304A/HMS87C1302A
HYUNDAI MicroElectronics
9.3 RC and RCIO registers
RC is a 2-bit bidirectional I/O port (address C4_H). Each
pin can be set individually as input and output through the
RCIO register (address C5_H).
RC Data Register
ADDRESS : C4H
RESET VALUE : Undefined
RC
-
--
-
-
- RC1 RC0
RC Direction Register
RCIO
INPUT / OUTPUT DATA
ADDRESS : C5H
RESET VALUE : ------00
DIRECTION SELECT
0 : INPUT PORT
1 : OUTPUT PORT
Figure 9-4 Registers of Port RC
9.4 RD and RDIO registers
RD is a 4-bit bidirectional I/O port (address C6_H). Each
RDIO register (address C7_H).
pin can be set individually as input and output through the
RD Data Register
RD
-
--
-
y ^{ADDRESS : C6H}
RESET VALUE : Undefined
r _{RD3 RD2 RD1 RD0}
ina ^{INPUT / OUTPUT DATA}
RD Direction Register
RDIO
Prelim ^{Figure 9-5 Registers of Port RD}
ADDRESS : C7H
RESET VALUE : -----000
DIRECTION SELECT
0 : INPUT PORT
1 : OUTPUT PORT
32
Preliminary
Jan. 2001