Toshiba H1 Series Data Book page 622

3.25 Power Management Circuit (PMC)
The TMP92CZ26A incorporates a power management circuit (PMC) for managing power
supply in standby state as protective measures against leak current in fine-process products.
The following six power supply rails are available.
･Analog power supply
･3V-A, 3V-B digital I/O power supply
･1.5V-A digital internal power supply
･1.5V-B digital internal power supply
･1.5V-C oscillation power supply
Each power supply rail is independent of one another (VSS is partially shared).
Of the six power supply rails, those that are supplied in Power Cut Mode are the power
supply rail for external pins (DVCC-3A, DVCC-3B), the power supply rail for ADC (AVCC),
and the power supply rail for RTC and backup RAM (DVCC-1B). DVCC1A and DVCC1C
power supply rails are isolated internally with their signals cut off so that no flow-through
current will be generated in the LSI when the power is turned off.
• DVCC-3A, DVCC-3B
This 3V rail supplies power for holding external pins, controlling ON/OFF of external power
supplies, and interrupt input to release standby state.
• AVCC
This 3V rail supplies power in the touch panel interface for interrupt input to release
standby state.
• DVCC-1B
This 1.5V rail supplies power to the RTC, 16 Kbytes of RAM, and PMC.
DVCC-1C
AVCC
ADC
High-
Control
OSC
AVSS
DVSS-1C
: AVCC & AVSS (for ADC)
: DVCC3A, 3B & DVSSCOM (for general pins)
: DVCC1A & DVSSCOM (for general circuits)
: DVCC1B & DVSSCOM (for RTC, PMC)
: DVCC1C & DVSS1C
(for high-frequency oscillator, PLL)
DVCC-1A
CPU, Other logic
& RAM 272 KB
DVSS-COM
Figure 3.25.1 Power Supply System
92CZ26A-619
DVCC-1B
TMP92CZ26A
RAM 16KB RTC
I/O
Reg
PMC
Low-OSC
XT1
XT2
TMP92CZ26A
DVCC-3A,3B
INT
Port
Others
I/O