MCMC68HC05L16 Freescale Semiconductor, Inc, MCMC68HC05L16 Datasheet - Page 101

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

10.6 LCD Data Register
LCDRx — LCD Data Registers
Freescale Semiconductor
Data in the LCDRx (LCDR1–LCDR20) controls the waveform of the two frontplane drivers. Bits 0–3
and bits 4–7 of this register decide the waveforms at the BP0–BP3 timings. If the LCD duty is not 1/4,
the register bit for the unused backplane has no meaning. The upper four bits of LCDR20 are not
implemented and unknown data may be read. (See
0 = Output deselect waveform at the corresponding backplane timing
1 = Output select waveform at the corresponding backplane timing
Address:
Duty
1 / 1
1 / 2
1 / 3
1 / 4
Reset:
Read:
Write:
Bit 7
BP3
Bit 7
BP3
$0021–$0034
—
—
—
Table 10-3. Frontplane Data Register Bit Usage
MC68HC05L16 • MC68HC705L16 Data Sheet, Rev. 4.1
BP2
Bit 6
BP2
BP2
6
—
—
Figure 10-6. LDC Data Registers
FP (2x–1)
Frontplane Data Register Bit Usage
Bit 5
BP1
BP1
BP1
BP1
5
—
Unaffected by reset
Bit 4
BP0
BP0
BP0
BP0
BP0
4
Table
Bit 3
BP3
BP3
—
—
—
3
10-3.)
Bit 2
BP2
BP2
BP2
—
—
2
FP (2x–2)
Bit 1
BP1
BP1
BP1
—
BP1
1
Bit 0
BP0
BP0
BP0
BP0
Bit 0
BP0
LCD Data Register
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