HMS87C1304A Datasheet, PDF (11/70 Pages) Hynix Semiconductor – CMOS SINGLE-CHIP 8-BIT MICROCONTROLLER

HYUNDAI MicroElectronics
HMS87C1304A/HMS87C1302A
• RB2/INT0, RB3/INT1
Pull-up
Select
Data Bus
Data Reg.
Open Drain
Weak Pull-up
V_DD
Function
Select
Data Bus
Direction Reg.
V_SS
Data Bus
INT0, INT1
Read
Schmitt Trigger
• RC0, RD0, RD1, RD2, RD3
Data Bus
Data Bus
Data Bus
ary Data Reg.
in _{Direction Reg.}
Prelim ^Read
• RC1
Data Bus
Data Bus
Data Bus
Data Reg.
Open Drain
Direction Reg.
Read
V_DD
V_SS
Jan. 2001
Preliminary
11