UPD17073 NEC, UPD17073 Datasheet - Page 84

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

12.2.3 Application example of basic timer 0
84
An example of a program in which the basic timer 0 is used is shown below.
In this example, processing A is executed every 1 second.
Example
reset
At
Basic timer 0 carry register
LOOP:
NEXT:
Power-ON
Clock stop
CE
Name
M1
BANK1
SKT1
BR
ADD
SKT1
BR
BR
Processing A
Processing B
Figure 12-2. Configuration of Basic Timer 0 Carry Register
0
MEM 1.10H
BTM0CY
NEXT
M1, #0010B
CY
NEXT
LOOP
0
b
0
3
Flag symbol
0
b
0
2
0
1
1
b
0
; 1-second counter, set to bank 1
; Branches to NEXT if BTM0CY flag is “0”
; Adds 2 to M1
; Executes processing A if CY flag is “1”
; Branches to NEXT if CY flag is “0”
; Executes processing B and branches to LOOP
1
b
M
B
T
C
Y
0
0
1
0
Flip-flop is not set.
Flip-flop is set.
Fixed to "0".
(BANK1)
Address
51H
Detects status of flip-flop.
R&Reset
Read/
Write
PD17072,17073