MC9S08LC60 Datasheet, PDF (155/358 Pages) Freescale Semiconductor, Inc – Microcontrollers

Liquid Crystal Display Driver (S08LCDV1)
Table 9-20. V_DD Switch Option
VSUPPLY[1:0]
V_DD Switch Option
Recommend Use for
3-V LCD Panels
Recommend Use for
5-V LCD Panels
00
V_LL2 is generated from V_DD
01
V_LL3 is generated from V_DD
• V_LL1 = 1v
• V_DD = V_LL2 = 2v
• V_LL3 = 3v
• V_LL1 = 1v
• V_LL2 = 2v
• V_DD = V_LL3 = 3v
• V_LL1 = 1.67v
• V_DD = V_LL2 = 3.3v
• V_LL3 = 5v
Invalid LCD power
configuration
9.4.5 Resets
During a reset, the LCD module system is configured in the default mode. The default mode includes the
following settings:
• LCDEN is cleared, thereby forcing all frontplane and backplane driver outputs to the high
impedance state.
• 1/4 duty
• 1/3 bias
• All frontplane enable bits, FP[n]EN, are cleared
• LCLK[2:0], VSUPPLY[2:0], BBYPASS, and BRATE[2:0] revert to their reset values
9.4.6 Interrupts
When an LCD module frame (LPWAVE = 0) or sub-frame (LPWAVE = 1) frequency interrupt event
occurs, the LCDIF bit in the LCDCMD register is asserted. The LCDIF bit remains asserted until the LCD
module frame frequency interrupt is cleared by software. The interrupt can be cleared by software by
writing a 1 to the LCDIF bit.
If a both the LCDIF bit in the LCDCMD register and the LCDIEN bit in the LCDCR1 register are set, an
LCD interrupt signal asserts.
For both normal waveform and low-power waveform, configured for the same frequency with the same
clock configuration. The low-power waveform splits a frame into two subframes with equal duration. See
Figure 9-11 through Figure 9-16.
When an LCD module frame(LPWAVE=0) or sub-frame(LPWAVE=1) frequency interrupt event occurs,
the LCDIF bit in the LCDCMD register is asserted. The LCDIF bit remains asserted until the LCD module
frame frequency interrupt is cleared by software. The interrupt can be cleared by software by writing a 1
to the LCDIF bit.
9.5 Initialization Section
This section provides a recommended initialization sequence for the LCD module and also includes
initialization examples for several possible LCD application scenarios.
MC9S08LC60 Series Advance Information Data Sheet, Rev. 2
Freescale Semiconductor
PRELIMINARY
155