sh66k31c SinoWealth Micro-Electronics Corp. Ltd, sh66k31c Datasheet - Page 17

• Manufacturer Part Number: sh66k31c
• Description: Mask 4-bit Micro-controller
• Manufacturer: SinoWealth Micro-Electronics Corp. Ltd

11. HALT and STOP Mode
After the execution of HALT instruction, SH66K31C will enter the HALT mode. In HALT mode, the CPU will stop operating; but
the peripheral circuit (timer) will keep status.
After the execution of STOP instruction, SH66K31C will enter the STOP mode.
In STOP mode, the entire chip (including oscillator) will stop operating.
In HALT mode, SH66K31C can be waked up if any interrupt occurs.
In STOP mode, SH66K31C can be waked up if port interrupt occurs.
12. 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
Power-on Reset
Wake up from Stop Mode
Warm-up time interval:
(1) In Crystal oscillator or Ceramic resonator mode, f
(2) In Crystal oscillator or Ceramic resonator mode, f
13. Code Option
0: Disable pull-high resistor (Default)
1: Enable pull-high resistor
Port Interrupt Source Select:
0: Int. source: PB, PC (Default)
1: Int. source: PA.1 - 3, PB.0 - 3, PC.0
Instruction Cycle Time:
0: Instruction cycle time = 4/f
1: Instruction cycle time = 16/f
LPD Function Enable Select:
0: Use LPD register ($15) control (Default = 0)
1: LPD always enable, LPD register ($15) inactive.
RESET Pin internal pull-high resistor:
the warm-up time interval is 1.13 ms.
the warm-up time interval is 0.128 ms
OSC
OSC
(Default) - (only use for less than 500kHz oscillator)
OSC
OSC
= 455kHz, the warm-up counter prescaler divide ratio is /2
= 4MHz, the warm-up counter prescaler divide ratio is /2
17
SH66K31C
9
9
(512), and
(512), and