TMP91xy16FG Toshiba, TMP91xy16FG Datasheet - Page 168

• Manufacturer Part Number: TMP91xy16FG
• Manufacturer: Toshiba

Specifications of TMP91xy16FG

• Package: LQFP100
• Rom Types(m=mask,p=otp, F=flash,e=eeprom): Romless
• Rom Combinations: Romless
• Ram Combinations: Ramless
• Architecture: 16-bit CISC
• Usb/spi Channels: -
• Uart/sio Channels: 1
• I2c/sio Bus Channels: -
• (s)dram Controller: 1
• Adc 10-bit Channel: -
• Da Converter: -
• Timer 8-bit Channel: 4
• Timer 16-bit Channel: -
• Pwm 8-bit Channels: -
• Pwm 16-bit Channels: -
• Cs/wait Controller: 4
• Dual Clock: Y
• Number Of I/o Ports: 31
• Power Supply Voltage(v): 2.7 to 3.6

3.11 Watchdog Timer (Runaway detection timer)
3.11.1
Internal reset
CPU has started to malfunction (Runaway) due to causes such as noise.
INTWD to notify the CPU. Connecting the watchdog timer output to the reset pin internally
forces a reset. (The level of external
(f
The TMP91C016 features a watchdog timer for detecting runaway.
The watchdog timer (WDT) is used to return the CPU to normal state when it detects that the
When the watchdog timer detects a malfunction, it generates a non-maskable interrupt
FPH
f
SYS
Configuration
/2)
Figure 3.11.1 is a block diagram of he watchdog timer (WDT).
Note: It needs to care designing the total machine set, because watchdog timer can’t
WDMOD
<WDTP1 to WDTP0>
operate completely by external noise.
Figure 3.11.1 Block Diagram of Watchdog Timer
Binary counter
(22 stage)
2
15
WDT control register WDCR
2
17
Selector
Write
4EH
2
Internal data bus
Reset
19
91C016-166
RESET
2
21
pin is not changed)
Write
B1H
WDMOD<RESCR>
R
WDMOD <WDTE>
Reset control
Q
S
WDTI interrupt
Internal reset
RESET
TMP91C016
2008-02-20