Z51F3220FNX Datasheet, PDF (268/312 Pages) Zilog, Inc. – Z8051 Series 8-Bit Microcontrollers

Z51F3220
Product Specification
11.15.4 LCD Voltage Dividing Resistor Connection
( 1/ 2 Bias ,160 K ohm)
VLCD
R
R
R
R
(1/ 2 Bias, 80K ohm )
R
VLCD
R
DISP
LCTEN
(1/ 3 BIAS)
VLC0
VLC1
VLC2
VLC3
VSS
VLC0
VLC1
VLC2
VLC3
VLCD
R
R
R
DISP
LCTEN
(1/ 4 BIAS)
VLC0
VLC1
VLC2
VLC3
VSS
VLC0
VLC1
VLC2
VLC3
VLCD
R
R
R
R
VLC0
VLC1
VLC2
VLC3
VLC0
VLC1
VLC2
VLC3
DISP
LCTEN
VSS
VLC0
VLC1
VLC2
VLC3
DISP
LCTEN
VSS
VLC0
VLC1
VLC2
VLC3
NOTES)
1. The above figures are for the internal resistor bias connection. So, It is not needed an external connection.
2. When the internal resistors are selected, all the P40/VLC3, P41/VLC2, P42/VLC1 and P43/VLC0 pins can be
used for normal I/O.
Figure 11.104 Internal Resistor Bias Connection
PS029902-0212
PRELIMINARY
266