TMP91xy40FG Toshiba, TMP91xy40FG Datasheet - Page 21

• Manufacturer Part Number: TMP91xy40FG
• Manufacturer: Toshiba

Specifications of TMP91xy40FG

• Package: LQFP100
• Rom Types(m=mask,p=otp, F=flash,e=eeprom): M/F
• Rom Combinations: 128
• Ram Combinations: 4
• Architecture: 16-bit CISC
• Usb/spi Channels: -
• Uart/sio Channels: 4
• I2c/sio Bus Channels: -
• (s)dram Controller: -
• Adc 10-bit Channel: 4
• Da Converter: -
• Timer 8-bit Channel: 4
• Timer 16-bit Channel: 3
• Pwm 8-bit Channels: -
• Pwm 16-bit Channels: -
• Cs/wait Controller: -
• Dual Clock: Y
• Number Of I/o Ports: 61
• Power Supply Voltage(v): 2.2 to 3.6

(4) Preventing software or system lockups using a protection register
Write other than 1FH to EMCCR1
Purpose:
system recovery routine from becoming unfetchable, for example, if the system clock
stops or a memory control register (CS/WAIT controller) is modified.
Applicable SFRs
Block diagram:
Description:
preventing specified SFRs from being written.
be determined by reading the <PROTECT> bit of the EMCCR0.
To prevent software or system lockups that may occur due to incoming noise.
Applying protection causes specified SFRs to be write-protected, thus preventing the
Writing any code other than 1FH to the EMCCR1 register enables protection,
Writing 1FH to the EMCCR1 register cancels protection. The state of protection can
A system reset cancels protection.
Write 1FH to EMCCR1
1. Clock gear (Only EMCCR1 can be written.)
SYSCR0, SYSCR1, SYSCR2, SYSCR3,
EMCCR0
Protection flag
SFR write signal
EMCCR0<PROTECT>
S
R
91CW40-19
Q
Write signal to other SFRs
Write signal to specified SFRs
TMP91CW40
2008-09-19