Toshiba TLCS-900/L1 Series Manual page 21

3.4.6 Standby Controller
(1) HALT modes
When the HALT instruction is executed, the operating mode switches to IDLE2,
IDLE1 or STOP mode, depending on the contents of the SYSCR2<HALTM1:0>
register.
The subsequent actions performed in each mode are as follows:
a. IDLE2: The CPU only is halted.
In IDLE2 mode internal I/O operations can be performed by setting the
following registers.
Table 3.4.1 shows the registers of setting operation during IDLE2 mode.
Table 3.4.1 The Registers of Setting Operation during IDLE2 Mode
b. IDLE1: Only the oscillator to operate.
c. STOP: All internal circuits stop operating.
The operation of each of the different HALT modes is described in Table 3.4.2.
HALT Mode
SYSCR2<HALTM1:0>
CPU
I/O ports
TMRA, TMRB
Block
SIO
AD converter
WDT
Interrupt controller
Internal I/O
TMRA01
TMRA23
TMRA45
TMRB0
SIO0
SIO1
AD converter
WDT
Table 3.4.2 I/O Operation during HALT Modes
IDLE2
11
Maintain same state as when HALT instruction was executed.
Can be selected
Operational
91C829-19
SFR
TA01RUN<I2TA01>
TA23RUN<I2TA23>
TA45RUN<I2TA45>
TB0RUN<I2TB0>
SC0MOD1<I2S0>
SC1MOD1<I2S0>
ADMOD1<I2AD>
WDMOD<I2WDT>
IDLE1
10
Stop
TMP91C829
STOP
01
See Table 3.4.5,
Table 3.4.6
Stopped
2006-03-15