參數(shù)資料
型號: M38C24M4-XXXFP
元件分類: 微控制器/微處理器
英文描述: 8-BIT, MROM, 4 MHz, MICROCONTROLLER, PQFP64
封裝: 14 X 14 MM, 0.80 MM PITCH, PLASTIC, LQFP-64
文件頁數(shù): 35/91頁
文件大?。?/td> 1867K
代理商: M38C24M4-XXXFP
39
38C2 Group
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER
MITSUBISHI MICROCOMPUTERS
PRELIMINAR
Y
Notice:
This
is not
a final
specification.
Some
parametric
limits
are
subject
to change.
LCD Power Circuit
The LCD power circuit has the dividing resistor for LCD power which
can be connected/disconnected with the LCD power control register.
Fig. 35 Structure of LCD power control register
Fig. 36 VL block diagram
VL3
P27/SEG23/
VL2
P26/SEG22/
VL1
Vcc
LCD mode
register (bit 2)
LCD power control
register (bit 5)
LCD power control
register (bit 0)
Dividing resistor
for LCD power
LCD power control
register (bits 2 and 1)
LCD power control
register (bit 6)
LCD internal VL3
LCD internal VL2
LCD internal VL1
Dividing resistor for LCD power control bit (LCDRON)
0 : Internal dividing resistor disconnected from LCD power circuit
1 : Internal dividing resistor connected to LCD power circuit
Dividing resistor for LCD power selection bits (RSEL)
b3 b2
1 0 :
Larger resistor
0 1 :
0 0 :
1 1 :
Smaller resistor
Not used (return “0” when read)
(Do not write to “1”)
VL pin input selection bit (VLSEL)
0 : Input invalid
1 : VL input function valid
VL3 connection bit
0 : Connect LCD internal VL3 to VCC
1 : Connect LCD internal VL3 to VL3 pin
Not used (return “0” when read)
(Do not write to “1”)
LCD power control register
(VLCON : address 003816)
b7
b0
Notes 1: When voltage is applied to VL1 to VL3 by using the external resistor, write “102” to
dividing resistor for LCD power selection bits.
2: Setting to the VL pin input selection bit (VLSEL) = “1” has the most priority than setting to
the port P2 direction register (address 0005
) and segment output disable register 2
(address 0FFA ).
3: When the LCD drive control circuit is used at VL3 = VCC, apply VCC to VL3 pin and write “1”
to VL3 connection bit.
16
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