sh66l06a SinoWealth Micro-Electronics Corp. Ltd, sh66l06a Datasheet - Page 21

• Manufacturer Part Number: sh66l06a
• Description: 1k 4-bit Micro-controller With Lcd Driver
• Manufacturer: SinoWealth Micro-Electronics Corp. Ltd

12. HALT and STOP Mode
After the execution of HALT instruction, SH66L06A will enter the HALT mode. In the HALT mode, the CPU will stop operating.
But peripheral (Timer, LCD) circuit will keep status.
After the execution of STOP instruction, SH66L06A will enter the STOP mode. The whole chip (Including oscillator) will stop
operating.
In the HALT mode, SH66L06A can be waked up if any interrupt occurs.
In the STOP mode, SH66L06A can be waked up if port or external interrupt occurs.
When CPU is awaked from the HALT/STOP by any interrupt source, it will execute the relevant interrupt serve subroutine at
first. Then the instruction next to HALT/STOP is executed.
13. Warm-up Timer
The device has a built-in warm-up timer to eliminate unstable state of initial oscillation when oscillator starts oscillating in the
following conditions:
A. Power-on Reset for OSC
(1) In 131kHz RC oscillator mode, the warm-up counter prescaler divide ratio is 1/2
(2) In 32.768kHz Crystal oscillator mode, the warm-up counter prescaler divide ratio is 1/2
B. Pad Reset for OSC
(1) In 131kHz RC oscillator mode, the warm-up counter prescaler divide ratio is 1/2
(2) In 32.768kHz Crystal oscillator mode, the warm-up counter prescaler divide ratio is 1/2
C. Wake up from STOP mode
(1) In 131kHz RC oscillator mode, the warm-up counter prescaler divide ratio is 1/2
(2) In 32.768kHz Crystal oscillator mode, the warm-up counter prescaler divide ratio is 1/2
21
12
8
8
(256).
(256).
(4096).
14
10
14
(16384).
(1024).
(16384).
SH66L06A