tmp89fm42 TOSHIBA Semiconductor CORPORATION, tmp89fm42 Datasheet - Page 55

• Manufacturer Part Number: tmp89fm42
• Description: 8 Bit Microcontroller
• Manufacturer: TOSHIBA Semiconductor CORPORATION

RA001
Table 2-5 Initialization of Built-in Hardware by Reset Operation and Its Status after Release
2.4.4 Reset Signal Generating Factors
Program counter (PC)
Stack pointer (SP)
RAM
General-purpose registers (W, A, B, C, D, E, H, L, IX and
IY)
Register bank selector (RBS)
Jump status flag (JF)
Zero flag (ZF)
Carry flag (CF)
Half carry flag (HF)
Sign flag (SF)
Overflow flag (VF)
Interrupt master enable flag (IMF)
Individual interrupt enable flag (EF)
Interrupt latch (IL)
High-frequency clock oscillation circuit
Low-frequency clock oscillation circuit
Warm-up counter
Timing generator prescaler and divider
Watchdog timer
Voltage detection circuit
I/O port pin status
Special function register
2.4.4.1
Note: The voltage detection circuits are disabled by an external reset input or power-on reset only.
Reset signals are generated by each factor as follows:
power is turned on, the supply voltage is raised to the operating voltage range with the
the "L" level, and a reset is applied 5 Ps after the oscillation is stabilized.
"L" level for 5 Ps with the stabilized oscillation, and then a reset is applied.
operation that follows reset release gets started.
External reset input (
Port P10 is also used as the
If the supply voltage is lower than the recommended operating voltage range, for example, when the
If the supply voltage is within the recommended operating voltage range, the
In each case, after a reset is applied, it is released by turning the
Built-in hardware
RESET
RESET
pin input)
Refer to the SFR map.
pin, and it serves as the
Disabled or enabled
Oscillation disabled
Oscillation enabled
mode:0x01FF
Page 41
Indeterminate
Indeterminate
Indeterminate
Indeterminate
Indeterminate
Indeterminate
Indeterminate
Indeterminate
Serial PROM
During reset
MCU mode:
Disabled
0xFFFE
0x00FF
Reset
HiZ
0
0
0
0
0
During the warm-up opera-
Refer to the SFR map.
tion that follows reset
Disabled or enabled
Oscillation disabled
Oscillation enabled
RESET
mode:0x01FF
Indeterminate
Indeterminate
Indeterminate
Indeterminate
Indeterminate
Indeterminate
Indeterminate
Indeterminate
Serial PROM
MCU mode:
Disabled
0xFFFE
0x00FF
release
Start
HiZ
0
0
0
0
0
pin after the power is turned on.
RESET
pin to "H" and the warm-up
warm-up operation that fol-
RESET
Refer to the SFR map.
Immediately after the
Disabled or enabled
Oscillation disabled
Oscillation enabled
lows reset release
mode:0x01FF
Indeterminate
Indeterminate
Indeterminate
Indeterminate
Indeterminate
Indeterminate
Indeterminate
Indeterminate
Serial PROM
MCU mode:
RESET
0xFFFE
Enabled
0x00FF
pin is kept at the
Stop
HiZ
TMP89FM42
0
0
0
0
0
pin kept at