tmp1941af TOSHIBA Semiconductor CORPORATION, tmp1941af Datasheet - Page 261

• Manufacturer Part Number: tmp1941af
• Description: 32-bit Tx System Risc
• Manufacturer: TOSHIBA Semiconductor CORPORATION

15. Analog-to-Digital Converter (ADC)
AN3/ ADTRG (P53)
converter (ADC).
general-purpose digital inputs (Port 5) if not needed as analog channels.
AN7 (P57)
AN6 (P56)
AN5 (P55)
AN4 (P54)
AN2 (P52)
AN1 (P51)
AN0 (P50)
The TMP1941AF has a 8-channel, multiplexed-input, 10-bit successive-approximation ananlog-to-digital
Figure 15.1 shows a block diagram of the ADC. The eight analog input channels (AN0–AN7) can be used as
Note:
VREFH
VREFL
Ensure that the ADC has halted before executing an insturction to place the TMP1941AF in IDLE, SLEEP
or STOP mode to reduce power supply current. Otherwise, the TMP1941AF might go into a standby
mode while the internal analog comparator is still active. In SLOW mode, the ADC must be disabled.
(ADMOD1)
A/D Mode Control Register 1
Channel Selection
Control Circuit
ADCH[2:0]
Internal Data Bus
VREFON
Figure 15.1 ADC Block Diagram
ADTRGE
TMP1941AF-221
Sample-and-
Hold
EOCF
end
A/D Mode Control Register 0 (ADMOD0)
ADBF
busy
D/A Converter
Internal Data Bus
ITM0
Comparator
interrupt
−
+
A/D Converter Control
REPEAT SCAN ADS
repeat
Circuit
scan
TMP1941AF
start
Interrupt
Request
(INTAD)
(ADREG04H–37H)
(ADREG04L–37L)
ADTRG
Result Registers
A/D Conversion
Internal Data Bus
2003-03-27