HMS87C5216 Datasheet, PDF (55/76 Pages) List of Unclassifed Manufacturers – CMOS SINGLE-CHIP 8-BIT MICROCONTROLLER FOR UR(Universal Remocon) & WIRELESS KEYBOARD

HMS87C5216
ecuting, SLEEP mode and STOP mode, the rest of executing is
the same as that of external Interrupt. Each SMRR Register bit is
allowed for each port (for Bit= ``0``, no Key Input, for Bit= ``1``,
Key Input available). At reset, SMRR becomes ``00 h``. So,
there is no Key Input source.
7
SMRR0
0
W <00DC h>
R00
R01
.
R0 port
.
Selection Logic
.
R07
7
SMRR1
Internal
Key Scan
Interrupt
0
W <00DD h>
R10
R11
.
R0 port
.
Selection Logic
.
R17
Figure 13-5 Key Scan Block
SMRR0
7
KR07
KR06
SMRR0 Register
KR05
KR04
KR03
KR02
KR01
0
KR00
W <00DC h>
SMRR1
7
KR17
KR16
SMRR1 Register
KR15
KR14
KR13
KR12
KR11
0
KR10
W <00DD h>
SEP. 2004 Ver 1.01