参数资料
型号: ST6242BQ1/XXX
厂商: STMICROELECTRONICS
元件分类: 微控制器/微处理器
英文描述: 8-BIT, MROM, 8 MHz, MICROCONTROLLER, PQFP64
封装: PLASTIC, QFP-64
文件页数: 44/69页
文件大小: 1846K
代理商: ST6242BQ1/XXX
Obsolete
Product(s)
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Product(s)
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ST62T42B/E42B
LCD CONTROLLER-DRIVER (Continued)
4.5.4 Stand by or STOP operation mode
No clock from the main oscillator is available in
STOP mode for the LCD controller, and the con-
troller is switched off when the STOP instruction is
executed. All segment and common lines are then
switched to ground to avoid any DC biasing of the
LCD elements.
4.5.5 LCD Mode Control Register (LCDCR)
Address: DCh - Read/Write
Bits 7-6 = DS0, DS1. Multiplexing ratio select bits.
These bits select the number of common back-
planes used by the LCD control.
Bits 5-3 = HF0, HF1, HF2. Oscillator select bits.
These bits allow the LCD controller to be supplied
with the correct frequency when different high
main oscillator frequencies are selected as system
clock. Table 18 shows the set-up for different clock
crystals.
Bits 2-0 = LF0, LF1, LF2. Base frame frequency
select bits. These bits control the LCD base oper-
ational frequency of the LCD common lines.
70
DS1
DS0
HF2
HF1
HF0
LF2
LF1
LF0
49
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