Epson S1C6S3N2 Technical Manual page 219

(3) Setting differential register and interrupt mask register
Specifications
Table 5.7.3
Setting of interrupt
generation conditions
Program
;
;
;
S1C6S3N2 TECHNICAL SOFTWARE
This program sets the mask registers and differential regis-
ters of K00–K03 and K10 as shown in the table below.
Port K10
Mask Register
1
Generation
Enabled
of Interrupt
Differential 0
Generation
Rising
edge
Conditions
Interrupt K1
interrupt
Generated
DI
LD X,74H
LDPX MX,1101B
LD MX,0111B
LD X,77H
LD MX,0100B
EI
EPSON
CHAPTER 5: PERIPHERAL CIRCUITS (Input Ports)
K03 K02
0 1
Disabled Enabled
1 1
Change from
Don't care
High input
status
K0 interrupt
; Disable interrupts
; Set the differential registers of K00–K03
; to "1101", Set the interrupt mask registers of
;
K00–K03 to "0111"
;
Enable interrupt at the rising edge of K10
;
; Enable interrupt
K01 K00
1 1
Enabled Enabled
0 1
Change from Change from
Low input High input
status status
II-73