UPD17073 NEC, UPD17073 Datasheet - Page 80

• Manufacturer Part Number: UPD17073
• Description: 4-BIT SINGLE-CHIP MICROCONTROLLER WITH HARDWARE FOR DIGITAL TUNING SYSTEM
• Manufacturer: NEC

may be issued.
shown in Table 11-2. If the IEG flag is cleared at this time, the edge detector circuit judges that a rising edge has
been input, and issues an interrupt request.
80
reset
At
Interrupt edge select
register
Note
Note that as soon as the interrupt request issuing edge is changed by the IEG flag, the interrupt request signal
Suppose that the IEG flag is set to “1” (specifying the falling edge) and that a high level is input to the INT pin, as
Power-ON
Clock stop
CE
Name
For the function of the BTM1CK flag, refer to 12.3.1 Outline of basic timer 1.
Figure 11-10. Configuration of Interrupt Edge Select Register
b
0
0
3
Flag symbol
b
N
T
0
1
0
0
0
I
2
b
M
B
T
C
K
0
1
1
0
0
0
1
b
G
E
0
1
0
0
0
I
0
Rising edge
Falling edge
32 ms (31.25 Hz)
8 ms (125 Hz)
Low level is input to INT pin
High level is input to INT pin
Fixed to “0”
(BANK1)
Address
56H
Sets input edge to issue interrupt request of INT pin
Sets time interval at which IRQBTM1 flag is set
Read/
Write
R/W
Detects status of INT pin
Note
PD17072,17073