TMP92CF30
2009-06-12
92CF30-39
3.4.6
Standby controller
(1)
HALT Modes and Port Drive register
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
and each pin-status is set according to the PxDR register, as shown below.
7 6 5 4 3 2 1 0
bit symbol
Px7D Px6D Px5D Px4D Px3D Px2D Px1D Px0D
Read/Write
R/W
System
Reset State
1 1 1 1 1 1 1 1
Hot Reset
State
−
−
−
−
−
−
−
−
PxDR
(xxxxH)
Function
Output/Input buffer drive-register for standby-mode
(Purpose and using)
•
This register is used to set each pin-status at stand-by mode.
•
All ports have this registers of the format shown above (“x” indicates the port-name.)
•
For each register, refer to 3.7 Function of Ports.
•
Before “HALT” instruction is executed, set each register pin-status. They will be
effective after the CPU has executed the “HALT” instruction.
•
This is the case regardless of stand-by mode (IDLE2, IDLE1 or STOP).
The Output/Input-buffer control table is shown below.
OE
PxnD
Output buffer
Input buffer
0 0
OFF
OFF
0 1
OFF
ON
1 0
OFF
OFF
1 1
ON
OFF
Note1: OE denotes an output enable signal before stand-by mode. Basically, PxCR is used as OE.
Note2: “n” in PxnD denotes the bit number of PORTx.
The subsequent actions performed in each mode are as follows:
a.
IDLE2: Only the CPU halts.
The internal I/O is available to select operation during IDLE2 mode by
setting the following register.
Table 3.4.3 shows the registers setting operation during IDLE2 mode.
Table 3.4.3 SFR setting operation during IDLE2 mode
Internal I/O
SFR
TMRA01 TA01RUN<I2TA01>
TMRA23 TA23RUN<I2TA23>
TMRA45 TA45RUN<I2TA45>
TMRA67 TA67RUN<I2TA67>
TMRB0 TB0RUN<I2TB0>
TMRB1 TB1RUN<I2TB1>
SIO0 SC0MOD1<I2S0>
SBI SBIBR0<I2SBI>
A/D converter
ADMOD1<I2AD>
WDT WDMOD<I2WDT>
b.
IDLE1: Only the oscillator, RTC (real-time clock), and MLD continue to
operate.
c.
STOP: All internal circuits stop operating.
Содержание TLCS-900/H1 Series
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