Toshiba TLCS-900/L1 Series Manual page 31

3.3.7 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: Only the CPU halts.
Table 3.3.2 SFR Seting Operation during IDLE2 Mode
TMRA01
TMRA23
SIO0
SIO1
AD converter
WDT
SBI
b. IDLE1: Only the oscillator and the RTC (Real time clock) and MLD continue to
operate.
c. STOP: All internal circuits stop operating.
The operation of each of the different HALT modes is described in Table 3.3.3.
HALT Mode
SYSCR2<HALTM1:0>
CPU
I/O ports
TMRA
Block
SIO, SBI
AD converter
WDT
RTC, MLD
The internal I/O is available to select operation during IDLE2 mode. By
setting the following register.
Table 3.3.2 shows the registers of setting operation during IDLE2 mode.
Internal I/O
TA01RUN<I2TA01>
TA23RUN<I2TA23>
SC0MOD1<I2S0>
SC1MOD1<I2S1>
ADMOD1<I2AD>
WDMOD<I2WDT>
SBI0BR0<I2SBI0>
Table 3.3.3 I/O Operation during HALT Modes
IDLE2
11
Keep the state when the HALT
instruction was executed.
Available to select
operation block
91C824-29
SFR
IDLE1
10
Stop
See Table 3.3.6, Table 3.3.7
Stop
Possible to operate
TMP91C824
STOP
01
2008-02-20