TMP92CA25FG Datasheet, PDF (424/426 Pages) Toshiba Semiconductor – Original CMOS 32-Bit Microcontroller

TMP92CA25
6.2 Notes
(1) AM0 and AM1 pins
These pins are connected to the V_CC (Power supply level) or the V_SS (Grand level) pin.
Do not alter the level when the pin is active.
(2) Reserved address areas
The 16 bytes area (FFFFF0H ∼ FFFFFFH) cannot be used since it is reserved for use as
internal area. If using an emulator, an optional 64 Kbytes of the 16M bytes area is used for
emulator control. Therefore, if using an emulator, this area cannot be used.
(3) Standby mode (IDLE1)
When the HALT instruction is executed in IDLE1 mode (in which only the oscillator
operates), the internal RTC (Real-time-clock) and MLD (Melody-alarm-generator) operate.
When necessity, stop the circuit before the HALT instruction is executed.
(4) Warm-up counter
The warm-up counter operates when STOP mode is released, even if the system is using
an external oscillator. As a result, a time equivalent to the warm-up time elapses between
input of the release request and output of the system clock.
(5) Watchdog timer
The watchdog timer starts operation immediately after a reset is released. Disable the
watchdog timer when is not to be used.
(6) AD converter
The string resistor between the VREFH and VREFL pins can be cut by program so as to
reduce power consumption. When STOP mode is used, disable the resistor using the
program before the HALT instruction is executed.
(7) CPU (Micro DMA)
Only the “LDC cr, r” and “LDC r, cr” instructions can be used to access the control
registers in the CPU. (e.g., the transfer source address register (DMASn).)
(8) Undefined SFR
The value of an undefined bit in an SFR is undefined when read.
(9) POP SR instruction
Please execute the POP SR instruction during DI condition.
92CA25-422
2007-02-28