TMP91xy25FG Toshiba, TMP91xy25FG Datasheet - Page 170

• Manufacturer Part Number: TMP91xy25FG
• Manufacturer: Toshiba

Specifications of TMP91xy25FG

• 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: 2
• I2c/sio Bus Channels: -
• (s)dram Controller: -
• Adc 10-bit Channel: 4
• 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: 49
• Power Supply Voltage(v): 3.0 to 3.6

3.11.2
Description of Operation
(1) Analog reference voltage
(2) Analog input channel selection
reference voltage is applied to the VREFL pin. To perform AD conversion, the reference
voltage as the difference between VREFH and VREFL, is divided by 1024 using string
resistance. The result of the division is then compared with the analog input voltage.
in AD mode control register 1. To start AD conversion in the off state, first write 1 to
ADMOD1<VREFON>, wait 3 μs until the internal reference voltage stabilizes (this is
not related to fc), then set ADMOD0<ADS> to 1.
converter.
•
•
selected as the fixed input channel. Pins not used as analog input channels can be used
as standard input port pins.
A high-level analog reference voltage is applied to the VREFH pin; a low-level analog
To turn off the switch between VREFH and VREFL, write 0 to ADMOD1<VREFON>
The analog input channel selection varies depends on the operation mode of the AD
Table 3.11.1 illustrates analog input channel selection in each operation mode.
After reset, ADMOD0<SCAN> = 0 and ADMOD1<ADCH2:0> = 000. Thus pin AN0 is
In analog input channel fixed mode (ADMOD0<SCAN> = 0)
Setting ADMOD1<ADCH2:0> selects one of the input pins AN0 to AN3 as the
input channel.
In analog input channel scan mode (ADMOD0<SCAN> = 1)
Setting ADMOD1<ADCH2:0> selects one of the 4 scan modes.
<ADCH2:0>
100-111
000
001
010
011
Table 3.11.1 Analog Input Channel Selection
Channel Fixed
<SCAN> = 0
Use prohibition
91C025-168
AN0
AN1
AN2
AN3
AN0
AN0 → AN1
AN0 → AN1 → AN2
AN0 → AN1 → AN2 → AN3
Use prohibition
Channel Scan
<SCAN> = 1
TMP91C025
2007-02-28