MCMC68HC05L16 Freescale Semiconductor, Inc, MCMC68HC05L16 Datasheet - Page 100

• Manufacturer Part Number: MCMC68HC05L16
• Description: M68hc05 Microcontrollers
• Manufacturer: Freescale Semiconductor, Inc

LCD Driver
10.5 LCD Control Register
LCDE — LCD Output Enable
DUTY1 and DUTY0 — LCD Duty Select
Bit 4 — Reserved
PEH — Select Port E (H)
PEL — Select Port E (L)
PDH — Select Port D (H)
Bit 0 — Reserved
100
The LCDE bit enables all BP and FP outputs. (This bit does not affect PEH, PEL, or PDH bits.) This
bit is cleared on reset.
The DUTY1 and DUTY0 bits select the duty of the LCD driver. The number of BP pins is related to this
duty selection. The unused BP pin is used as a port D pin. Default duty is 1/4 duty. These bits are
cleared on reset. See
This bit is not used and always reads as logic 0.
The PEH bit enables the upper four bits of port E instead of LCD drivers. This bit is cleared on reset.
See
The PEL bit enables the lower four bits of port E instead of LCD drivers. This bit is cleared on reset.
See
The PDH bit enables the upper four bits of port D instead of LCD drivers. This bit is cleared on reset.
See
This bit is not used and is always read as logic 0.
0 = All dedicated FP pins output highest (V
1 = All BP and FP pins output LCD waveforms.
0 = FP27–FP30 selected
1 = PE7–PE4 selected
0 = FP31–FP34 selected
1 = PE3–PE0 selected
0 = FP35–FP38 selected
1 = PD7–PD4 selected
10.4 Frontplane Driver and Port
10.4 Frontplane Driver and Port
10.4 Frontplane Driver and Port
data.
Address:
Reset:
Read:
Write:
$0020
LCDE
Bit 7
0
Table
Figure 10-5. LCD Control Register (LCDCR)
MC68HC05L16 • MC68HC705L16 Data Sheet, Rev. 4.1
10-1.
DUTY1
6
0
Selection.
Selection.
Selection.
DUTY0
5
0
DD
) level; BP and FP pins are shared with an output port
4
0
0
PEH
3
0
PEL
2
0
PDH
1
0
Freescale Semiconductor
Bit 0
0
0