MC9S12HZ256 Datasheet, PDF (256/692 Pages) Freescale Semiconductor, Inc – HCS12 Microcontrollers

Chapter 8 Liquid Crystal Display (LCD32F4BV1)
8.4.5.5 1/4 Duty Multiplexed with 1/3 Bias Mode
Duty = 1/4:DUTY1 = 0, DUTY0 = 0
Bias = 1/3:BIAS = 0 or BIAS = 1
V₀ = VSSX, V₁ = VLCD * 1/3, V₂ = VLCD * 2/3, V₃ = VLCD
- A maximum of 128 segments are displayed.
1 Frame
BP0
BP1
BP2
BP3
FPx (1001)
BP0-FPx (ON)
BP1-FPx (OFF)
Figure 8-13. 1/4 Duty and 1/3 Bias
VLCD
VLCD × 2/3
VLCD × 1/3
VSSX
VLCD
VLCD × 2/3
VLCD × 1/3
VSSX
VLCD
VLCD × 2/3
VLCD × 1/3
VSSX
VLCD
VLCD × 2/3
VLCD × 1/3
VSSX
VLCD
VLCD × 2/3
VLCD × 1/3
VSSX
+VLCD
+VLCD × 2/3
+VLCD × 1/3
0
-VLCD × 1/3
-VLCD × 2/3
-VLCD
+VLCD
+VLCD × 2/3
+VLCD × 1/3
0
-VLCD × 1/3
-VLCD × 2/3
-VLCD
MC9S12HZ256 Data Sheet, Rev. 2.04
256
Freescale Semiconductor