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參數(shù)資料
| 型號： | EM73MA89B |
| 英文描述： | Advanced Synchronous Rectified Buck MOSFET Drivers with Pre-POR OVP; Temperature Range: -40°C to 85°C; Package: 8-EPSOIC T&R |
| 中文描述： | 4，液晶產品位微控制器 |
| 文件頁數(shù)： | 9/64頁 |
| 文件大小： | 331K |
| 代理商： | EM73MA89B |
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17
* This specification are subject to be changed without notice.
EM73MA89B
4-BIT MICRO-CONTROLLER FOR LCD PRODUCT
Preliminary
10.15.2002 (V1.3)
SYSTEM CLOCK MODE CONTROL
The system clock mode controller can start or stop the high-frequency and low-frequency clock oscillator
and switch between the basic clocks. EM73MA89B has four operation modes (DUAL, SLOW, IDLE and
STOP operation modes).
Operation Mode
Oscillator
System Clock
Available function
One instruction cycle
NORMAL
High, Low frequency
High frequency clock
LCD, speech, HTC.
8 / fc
SLOW
Low frequency
Low frequency clock
LCD, HTC
4 / fs
IDLE
Low frequency
CPU stops
LCD
-
STOP
None
CPU stops
All disable
-
DUAL OPERATION MODE
The 4-bit c is in the DUAL operation mode when the CPU is reseted. This mode is dual clock system
(high-frequency and low-frequency clocks oscillating). It can be changed to SLOW or STOP operation
mode with the command register (P22 or P16).
LCD display, speech synthesizer and sound generator are available for the DUAL operation mode.
SLOW OPERATION MODE
The SLOW operation mode is single clock system (low-frequency clock oscillating). It can be changed to
the DUAL operation mode with the command register (P22), STOP operation mode with P16 and IDEL
operation mode with P19.
LCD display is available for the SLOW operation mode. Speech synthesizer and sound generator are
disabled in this mode.
STOP
operation
mode
NORMAL
operation
mode
IDLE
(CPU
stops)
SLOW
operation
mode
RESET
operation
High osc : stopped
Low osc : stopped
High osc : stopped
Low osc : oscillating
High osc : oscillating
Low osc : oscillating
High osc : stopped
Low osc : oscillating
Command
(P16)
Command
(P16)
Command
(P22)
Command
(P22)
Command
(P19)
Reset
Reset release
I/O wakeup
I/O or internal timer wakeup
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