參數(shù)資料
型號(hào): UPD17135AGT-xxx
廠商: NEC Corp.
元件分類: 4位微控制器
英文描述: 4-BIT SINGLE-CHIP MICROCONTROLLER FOR SMALL GENERAL-PURPOSE INFRARED REMOTE CONTROL TRANSMITTER
中文描述: 4位單片機(jī)的小型通用紅外遙控器
文件頁(yè)數(shù): 188/292頁(yè)
文件大?。?/td> 754K
代理商: UPD17135AGT-XXX
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CHAPTER 16 STANDBY FUNCTION
16.1 OVERVIEW OF THE STANDBY FUNCTION
The
μ
PD17134A subseries has a standby function to reduce the current consumption. The standby function can
be used in two modes which can be selected as the application requires: STOP and HALT modes.
In the STOP mode, the system clock is stopped. Therefore, the current consumption of the CPU in this mode is
only the leakage current. This mode is effective for holding the contents of the data memory without the CPU operating.
In the HALT mode, oscillation of the system clock continues, but the CPU is stopped because supply of the clock
to the CPU is stopped. The current consumption in this mode is greater than in the STOP mode. However, operation
can be resumed immediately after the HALT mode has been released because the system clock is oscillating. In both
the STOP and HALT Modes, the contents of the data memory and registers, and the status of the output latch of the
output port immediately before the standby mode is set are retained (except STOP 0000B). Therefore, set the port
status to reduce the overall current consumption of the system before setting a standby mode.
Table 16-1. Status in Standby Mode
STOP mode
HALT mode
Setting instruction
STOP instruction
HALT instruction
System clock oscillation circuit
Oscillation stops
Oscillation continues
Operating
CPU
Operation stops
status
RAM
Retains previous status
Port
Retains previous status
Note
TM0
Can operate only when INT input is
selected as count pulse
Stops if system clock is selected (count
value is retained)
Can operate
TM1
Operation stops
(count value is reset to “0”)
(count up is also disabled)
Can operate
BTM
Operation stops
(count value is retained)
Can operate
SIO
Can operate only when external clock is
selected as serial clock
Note
Can operate
A/D
Operation stops
Note
(ADCR
00H)
Can operate
INT
Can operate
Can operate
Note
When STOP 0000B is executed, these pins are set in the input port mode including when the multiplexed
function of the pin is used.
Cautions 1. Be sure to place a NOP instruction immediately before the STOP or HALT instruction.
2. The standby mode is not set if both the interrupt request flag and interrupt enable flag are
set and the interrupt is specified as the condition to release the standby mode.
169
相關(guān)PDF資料
PDF描述
UPD17136ACT-xxx 4-BIT SINGLE-CHIP MICROCONTROLLER FOR SMALL GENERAL-PURPOSE INFRARED REMOTE CONTROL TRANSMITTER
UPD17136AGT-xxx 4-BIT SINGLE-CHIP MICROCONTROLLER FOR SMALL GENERAL-PURPOSE INFRARED REMOTE CONTROL TRANSMITTER
UPD17137ACT-xxx 4-BIT SINGLE-CHIP MICROCONTROLLER FOR SMALL GENERAL-PURPOSE INFRARED REMOTE CONTROL TRANSMITTER
UPD17137AGT-xxx 4-BIT SINGLE-CHIP MICROCONTROLLER FOR SMALL GENERAL-PURPOSE INFRARED REMOTE CONTROL TRANSMITTER
UPD1713xA 4-BIT SINGLE-CHIP MICROCONTROLLER FOR SMALL GENERAL-PURPOSE INFRARED REMOTE CONTROL TRANSMITTER
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
UPD17136A 制造商:未知廠家 制造商全稱:未知廠家 功能描述:UPD17134A Subseries User's Manual | User's Manual[12/1996]
UPD17136ACT-XXX 制造商:NEC 制造商全稱:NEC 功能描述:4-BIT SINGLE-CHIP MICROCONTROLLER
UPD17136AGT-XXX 制造商:NEC 制造商全稱:NEC 功能描述:4-BIT SINGLE-CHIP MICROCONTROLLER
UPD17137A 制造商:未知廠家 制造商全稱:未知廠家 功能描述:UPD17134A Subseries User's Manual | User's Manual[12/1996]
UPD17137ACT-XXX 制造商:NEC 制造商全稱:NEC 功能描述:4-BIT SINGLE-CHIP MICROCONTROLLER