TMP93xy20FG Toshiba, TMP93xy20FG Datasheet - Page 200

• Manufacturer Part Number: TMP93xy20FG
• Manufacturer: Toshiba

Specifications of TMP93xy20FG

• Package: LQFP144
• Rom Types(m=mask,p=otp, F=flash,e=eeprom): M/P
• Rom Combinations: 64
• Ram Combinations: 2
• Architecture: 16-bit CISC
• Usb/spi Channels: -
• Uart/sio Channels: 2
• I2c/sio Bus Channels: 1
• (s)dram Controller: -
• Adc 10-bit Channel: 8
• Da Converter: -
• Timer 8-bit Channel: 4
• Timer 16-bit Channel: 4
• Pwm 8-bit Channels: -
• Pwm 16-bit Channels: -
• Cs/wait Controller: -
• Dual Clock: Y
• Number Of I/o Ports: 88
• Power Supply Voltage(v): 4.5 to 5.5

3.11.2
Operation
(1) Analog reference voltage
(2) Selecting analog input channels
(3) Starting AD conversion
voltage is applied to the VREFL pin. The voltage between VREFH and VREFL is
divided into 1024 increments using a string resistor. AD conversion is based on
comparing the analog input voltage with these reference voltage increments.
ADMOD1<VREFON> bit.
wait at 3 µs long enough to get the stabilized oscillation, write 1 to ADMOD0<ADS>.
the AD converter.
•
•
selecting pin AN0 for the AD converter input.
ports (P5).
and the falling edge is input through
indicating AD conversion is in progress.
the conversion result stored flag ADREGxxL<ADRxRF> to determine whether the AD
conversion data are valid at this time.
invalid.
<ADCH2:0>
High analog reference voltage is applied to the VREFH pin, and low analog reference
To turn the switch between VREFH and VREFL off, write 0 to the
To start AD conversion when the switch is off, first write 1 to <VREFON>. After that,
The procedure for selecting analog input channels depends on the operating mode of
Table 3.11.1 shows the analog input channel selection each operating mode.
A reset initializes ADMOD0<SCAN> to 0 and ADMOD1<ADCH2:0> to 000,
The pins not used as analog input channels can be used as general-purpose input
AD conversion starts when ADMOD0<ADS> to 1, or ADMOD1<ADTRGE> is set to 1
When AD conversion starts, AD conversion busy flag ADMOD0<ADBF> is set to 1,
Writing 1 to <ADS> while conversion is in progress restarts the conversion. Check
Inputting the falling edge to the
When analog input channel is used to fix (ADMOD0<SCAN> = 0)
When analog input channel is used to scan (ADMOD0<SCAN> = 1)
to AN7.
000
001
010
011
100
101
110
111
To set ADMOD1<ADCH2:0>, selecting one channel from analog input pins AN0
To set ADMOD1<ADCH2:0>, selecting one channel from 8 scan mode.
Table 3.11.1 Analog Input Channel Selection
Fixed Channel
<SCAN> = 0
93CS20-198
AN0
AN1
AN2
AN3
AN4
AN5
AN6
AN7
ADTRG
ADTRG
AN0
AN0 → AN1
AN0 → AN1 → AN2
AN0 → AN1 → AN2 → AN3
AN4
AN4 → AN5
AN4 → AN5 → AN6
AN4 → AN5 → AN6 → AN7
pin.
pin while conversion is in progress is
Channel Scan
<SCAN> = 1
TMP93CS20
2004-02-10