LCD Driver (LCD64F6B)
MPC5606S Microcontroller Reference Manual, Rev. 7
Freescale Semiconductor 791
1 LCDRST. Continue to drive LCD display while stop/standby requested.
Can be written only when LCDEN is cleared. See Section 22.5.8, Operation in power saving modes, for
details.
0 Stop LCD64F6B display driver system while stop/standby requested.
1 LCD display driver system operates normally while stop/standby requested.
2 LCDRCS. LCD Reference Clock Select.
Can be written only when LCDEN is cleared.
0 Source clock for LCD Driver system (prescaler input) is system clock.
1 Source clock for LCD Driver system (prescaler input) is OSC clock. See device level documentation for
detail on OSC clk.
3:5 DUTY. LCD Duty Select
The DUTY bits select the duty (multiplex mode) of the LCD Driver system, as shown in Table 22-29. The
multiplex mode should be changed only when LCD Driver is disabled, LCDEN is not set.
6 BIAS. BIAS Voltage Select
This bit selects the bias voltage levels during various LCD operating modes, as shown in Table 22-29
7 VLCDS. LCD voltage reference select.
The VCLDS bit selects which supply is be used as LCD waveform reference supply. Can be written only
when LCDEN is cleared.
0 VDDX is used as reference supply.
1 VLCD is used as reference supply.
8:9 PWR. LCD Power mode
The PWR bits select the output current and have a direct impact on the power consumption and drive
capability of the LCD64F6B module. Tabl e 22-30 lists the possible selections.
10 BSTEN. LCD output current boost enable
Since the LCD appears like a capacitance to the driver it is sometimes useful to boost the output current
during transitions to increase the slew rate of the driver.
0 No output current boost available.
1 Output current boost during transitions according to the BSTSEL bit.
11 BSTSEL. LCD output current boost select
The BST bit sets the multiplier for the output current boost. If the BSTEN bit is set, the output current is
boosted during transitions in the following way:
0 8 times boosting.
1 16 times boosting.
Table 22-6. LCDCR field descriptions (continued)
Field Description
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