Table 2-13. Touch Screen Controller Power Modes - Sharp LH79524 User Manual

LH79524/LH79525 User's Guide
BIT
7:6
5
4
3:0
PWM BIT VALUES
NOTES:
1. nIDLE refers to whether the state machine is in the Idle state:
1 = Control Bank State Machine is in another state besides the Idle state.
0 = Control Bank State Machine is in the Idle state.
2. A2DCLK ENABLE refers to whether the A2DCLK signal is enabled:
1 = Enables the A2DCLK to the analog circuitry.
0 = Disables the A2DCLK to the analog circuitry. (The clock is always enabled to the digital circuitry.)
3. BANDGAPON refers to whether Band Gap is turned on (required for the Brownout Detector):
1 = Turns on the Band Gap. This setting is required for the Brownout Detector to work.
0 = Turns off the Band Gap, disabling the Brownout Detector.
4. A2DON refers to whether the analog circuitry is enabled for the ADC:
1 = Enables the analog circuitry for the ADC.
0 = Disables the analog circuitry for the ADC.
Table 2-12. PC Fields (Cont'd)
NAME
Touch Screen Controller Power Mode Tis field also affects the of
the A2DCLK, Band Gap, and A2D signals (see Table 2-13).
00 = Turns off Power Mode and clock; sets the BROWNOUT
field (bit [9]) of the GS Register, indicating that a brownout is
detected, even if VDDA_ADC is at the correct voltage.
01 = Standby (wake on SSB or Pen Interrupt, convert, return); clears
PWM
the GS:BROWNOUT bit, even if VDDA_ADC is correct voltage.
10 = Run (always on); clears the BROWNOUT field (bit [9]) of the
GS Register, even if VDDA_ADC is at the correct voltage.
11 = Turns off Power Mode and clock; sets the BROWNOUT
field (bit [9]) of the GS Register, indicating that a brownout is
detected, even if VDDA_ADC is at the correct voltage.
Reference Enable Enables the internal reference buffer so that the
ADC can use the on-chip reference as the positive reference.
REFEN
1 = Enable
0 = Disable
Battery Control Enable
BATEN
1 = Battery Control Logic Enabled
0 = Battery Control Logic Disabled
Number of Conversions (NOC) in Sequence Actual number of
NOC
conversions is NOC + 1, and ranges from 1 to 16.

Table 2-13. Touch Screen Controller Power Modes

1
nIDLE
00 0
00 1
01 0
01 1
10 0
10 1
11 0
11 1
Version 1.0
Analog-to-Digital Converter/Brownout Detector
DESCRIPTION
2
A2DCLK ENABLE
0
0
0
1
0
1
0
0
3
BANDGAPON A2DON
0 0
0 0
1 0
1 1
1 1
1 1
0 0
0 0
4
2-17