UPD78F9418A NEC, UPD78F9418A Datasheet - Page 267

• Manufacturer Part Number: UPD78F9418A
• Description: (UPD7894xxA) 8-Bit Single Chip Microcontrollers
• Manufacturer: NEC

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19.1 Mask Option for Pins
mask option is selectable in 1-bit units.
19.2 Mask Option for Voltage Division Resistor for LCD Driver
listed below:
P50 to P53
The mask ROM versions of the µ PD789407A and µ PD789417A Subseries have the following mask options.
Caution The flash memory version does not have a mask option.
For P50 to P53 (port 5), a mask option is used to specify whether a pull-up resistor is to be incorporated. The
A mask option is used to specify whether a voltage division resistor is to be incorporated for the LCD driver, as
Pin
Whether a pull-up resistor is to be incorporated can be specified in 1-bit units.
−: Not selectable
R
Table 19-2. Combination of Selectable Voltage Division Resistor
: Selectable
LC2
LIPS0
Table 19-1. Selection of Mask Option for Pins
LIPS0: Bit 4 of LCD display mode register 0 (LCDM0)
CHAPTER 19 MASK OPTIONS
None
10 kΩ
100 kΩ
User’s Manual U13952EJ3V0UD
None
V
DD
P-ch
R
R
R
R
LC1
LC2
LC2
LC2
Mask Option
R
LC1
20 kΩ
BIAS
V
V
V
(2 × R
LC0
LC1
LC2
−
−
LC2
V
)
SS
V
200 kΩ
LCD
−
−
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