TMP91xy40FG Toshiba, TMP91xy40FG Datasheet - Page 19

• 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

3.3.4
3.3.5
Prescaler Clock Control Unit
prescaler clock sources φT and φT0 are f
Noise Reduction Circuits
electromagnetic interference (EMI) and electromagnetic susceptibility (EMS):
(1) Reducing drive capability of the high-frequency oscillator
(2) Reducing drive capability of the low-frequency oscillator
(3) Canceling double-drive operation of the high-frequency oscillator
(4) Preventing software or system lockups using a protection register
below.
(1) Reducing drive capability of the high-frequency oscillator
The internal I/O functions (SIO0 to SIO3) are provided with a clock prescaler. The
The TMP91CW40 incorporates circuits providing the following features to reduce
These features are specified using the EMCCR0 and EMCCR1 registers, as described
Purpose:
consumption of the high-frequency oscillator when an external resonator is connected.
Block diagram:
Description:
high-frequency oscillator’s drive capability. A system reset initializes the <DRVOSCH>
bit to 1, so the high-frequency oscillator starts oscillating with normal drive capability
upon power-on. The <DRVOSCH> bit should not be set to 0 when Vcc ＜ 2.7V.
To suppress noise generated by the high-frequency oscillator and to reduce power
Setting the <DRVOSCH> bit of the EMCCR0 register to 0 reduces the
Resonator
C2
C1
X1 pin
X2 pin
91CW40-17
FPH
/
2 and f
EMCCR0<DRVOSCH>
FPH
Enable oscillation (STOP+EMCCR0<EXTIN>)
/
4, respectively.
fc
TMP91CW40
2008-09-19