upd17072 Renesas Electronics Corporation., upd17072 Datasheet - Page 83
upd17072
Manufacturer Part Number
upd17072
Description
4-bit Single-chip Microcontroller With Hardware For Digital Tuning System
Manufacturer
Renesas Electronics Corporation.
Datasheet
1.UPD17072.pdf
(226 pages)
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12.2.2 Flip-flop and BTM0CY flag
register.
instructions shown in Table 12-1.
stop instruction is executed. Therefore, this flag can be used as a power failure detection flag.
the supply voltage. Once a read instruction has been executed, this flag is set at fixed time intervals.
The flip-flop is set at fixed time intervals and its status is detected by the BTM0CY flag of the basic timer 0 carry
The BTM0CY flag is a read-only flag, and is reset to “0” if its contents are read (Read & Reset) by using the
The BTM0CY flag is reset to “0” at power-ON reset, and is set to “1” at CE reset and at CE reset after the clock
The BTM0CY flag is not set until its contents are read by the instruction shown in Table 12-1 after application of
Figure 12-2 shows the configuration and function of the basic timer 0 carry register.
Note
Remark m = 51H
ADD
ADDC
SUB
SUBC
AND
OR
XOR
SKE
SKEG
SKLT
SKNE
Mnemonic
Table 12-1. Instructions to Reset BTM0CY Flag
When the row address of m is 5H and 1H is written to r.
m, #n4
Operand
ADD
ADDC
SUB
SUBC
AND
OR
XOR
LD
SKT
SKF
MOV
Mnemonic
r, m
m, #n
@r, m
m, @r
Operand
Note
PD17072,17073
83
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