參數(shù)資料
型號(hào)： HD404829R
廠商： Hitachi,Ltd.
英文描述： AS Microcomputer Incorporating a LCD controller/Driver Circuit(帶LCD控制/驅(qū)動(dòng)電路的微計(jì)算機(jī))
中文描述： 由于微機(jī)安裝有LCD控制器/驅(qū)動(dòng)電路（帶液晶控制/驅(qū)動(dòng)電路的微計(jì)算機(jī)）
文件頁數(shù)： 34/147頁
文件大小： 519K
代理商： HD404829R
HD404829R Series
34
Stop Mode:
In stop mode, all MCU operations stop and RAM data is retained. Therefore, the power
dissipation in this mode is the least of all modes. The OSC
1
and OSC
2
oscillator stops. For the X1 and X2
oscillator to operate or stop can be selected by setting bit 3 of the system clock select register (SSR: $029;
operating: SSR3 = 0, stop: SSR3 = 1) (figure 27). The MCU enters stop mode if the STOP instruction is
executed in active mode when bit 3 of timer mode register A (TMA: $008) is set to 0 (TMA3 = 0) (figure
44).
Stop mode is terminated by a RESET input or a
STOPC
input as shown in figure 16. RESET or
STOPC
must be applied for at least one t
RC
to stabilize oscillation (refer to the AC Characteristics section). When
the MCU restarts after stop mode is cancelled, all RAM contents before entering stop mode are retained,
but the accuracy of the contents of the accumulator, B register, W register, X/SPX register, Y/SPY register,
carry flag, and serial data register cannot be guaranteed.
Stop mode
Oscillator
Internal
clock
STOP instruction execution
(at least equal to oscillator stabilization time t
RC
)
t
res
RESET
STOPC
Figure 16 Timing of Stop Mode Cancellation
Watch Mode:
In watch mode, the clock function (timer A) using the X1 and X2 oscillator and the LCD
function operate, but other function operations stop. Therefore, the power dissipation in this mode is the
second least to stop mode, and this mode is convenient when only clock display is used. In this mode, the
OSC
1
and OSC
2
oscillator stops, but the X1 and X2 oscillator operates. The MCU enters watch mode if
the STOP instruction is executed in active mode when TMA3 = 1, or if the STOP or SBY instruction is
executed in subactive mode.
Watch mode is terminated by a RESET input or a timer-A/
INT
0
interrupt request. For details of RESET
input, refer to the Stop Mode section. When terminated by a timer-A/
INT
0
interrupt request, the MCU
enters active mode if LSON = 0, or subactive mode if LSON = 1. After an interrupt request is generated,
the time required to enter active mode is t
RC
for a timer A interrupt, and T
X
(where T + t
RC
< T
X
< 2T +
t
RC
) for an
INT
0
interrupt, as shown in figures 17 and 18.
Operation during mode transition is the same as that at standby mode cancellation (figure 15).
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HD404829RFS 制造商:RENESAS 制造商全稱:Renesas Technology Corp 功能描述:AS Microcomputer Incorporating a LCD controller/Driver Circuit
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HD404829RTF 制造商:未知廠家 制造商全稱:未知廠家 功能描述:4-Bit Microcontroller
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