參數(shù)資料
型號： UPD17201A
廠商： NEC Corp.
英文描述： 4-BIT SINGLE-CHIP MICROCONTROLLER WITH LCD CONTROLLER/DRIVER AND A/D CONVERTER FOR INFRARED REMOTE CONTROL TRANSMITTERS
中文描述： 4位單片機與LCD控制器/驅(qū)動器和A / D轉(zhuǎn)換器紅外遙控遞質(zhì)
文件頁數(shù)： 78/120頁
文件大?。?/td> 516K
代理商： UPD17201A
μ
PD17201A, 17207
78
13. STANDBY FUNCTIONS
The
μ
PD17207 has two modes of standby functions: HALT mode and STOP mode. The standby functions reduce
the power dissipation of the
μ
PD17207.
In HALT mode, the
μ
PD17207 stops the execution of the program with the main clock on. (The CPU stops to run.)
This mode is kept until a HALT releasing condition is satisfied.
In STOP mode, the
μ
PD17207 stops the execution of the program with the main clock off. The
μ
PD17207 dissipates
less circuit current in STOP mode than in HALT mode.
HALT mode is set by the execution of a HALT instruction and STOP mode is set by the execution of a STOP
instruction.
13.1
HALT MODE
In HALT mode, the
μ
PD17207 stops the execution of the program with the main clock on for reduction of its power
dissipation.
Execute a HALT instruction to set HALT mode.
The condition of releasing HALT mode is determined by the operand of the HALT instruction. See Table 13-1.
After HALT mode is released, the
μ
PD17207 performs operations as shown in Table 13-2.
Caution Do not execute an instruction to clear the interrupt request flag (IRQxxx) whose interrupt enable
flag (IPxxx) is set immediately before the HALT 8H or HALT 0AH instruction is executed. If the
flag is cleared, the HALT mode may not be set.
Table 13-1 HALT Mode Releasing Conditions
Operand Value
HALT Mode Releasing Condition
0010B
(02H)
1)
When an 8-bit timer interrupt request (IRQTM) is made
1000B
(08H)
1)
When an interrupt request (IRQTM, IRQWTM, IRQSIO, or IRQ) is made for an interrupt
whose enable flag (IPTM, IPWTM, IPSIO, or IP) is on (“1”)
When any of pins P0A
0
to P0A
3
goes low
2)
1010B
(0AH)
1)
2)
When an 8-bit timer interrupt request (IRQTM) is made
When an interrupt request (IRQWTM, IRQSIO, or IRQ) is made for an interrupt whose
enable flag (IPWTM, IPSIO, or IP) is on (“1”)
Others
Inhibited
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