c8051t617 Silicon Laboratories, c8051t617 Datasheet - Page 26

• Manufacturer Part Number: c8051t617
• Description: Mixed Signal Byte-programmable Eprom Mcu
• Manufacturer: Silicon Laboratories

C8051T610/1/2/3/4/5/6/7
1.7.
The C8051T610/1/2/3/6 devices include an on-chip 10-bit SAR ADC with a differential single-ended input
multiplexer. With a maximum throughput of 500 ksps, the ADC offers true 10-bit accuracy with an INL of
±1LSB. The ADC system includes a configurable analog multiplexer that selects the positive input to the
ADC. Ports1-3 are available as an ADC inputs; additionally, the on-chip Temperature Sensor output and
the power supply voltage (V
save power.
Conversions can be started in six ways: a software command, an overflow of Timer 0, 1, 2, or 3, or an
external convert start signal. This flexibility allows the start of conversion to be triggered by software
events, a periodic signal (timer overflows), or external HW signals. Conversion completions are indicated
by a status bit and an interrupt (if enabled). The resulting 10-bit data word is latched into the ADC data
SFRs upon completion of a conversion.
Window compare registers for the ADC data can be configured to interrupt the controller when ADC data is
either within or outside of a specified range. The ADC can monitor a key voltage continuously in back-
ground mode, but not interrupt the controller unless the converted data is within/outside the specified
range.
26
P1.6 and P1.7 available
on C8051T610/1/2/3/4/5
P2.6 and P2.7 available
on C8051T610/1/2/3/4/5
P3.1 and P3.4 available
on C8051T610/2
Sensor
10-Bit Analog to Digital Converter
Temp
P1.0
P1.7
P2.0
P2.7
P3.0
P3.4
VDD
DD
Figure 1.8. 10-Bit ADC Block Diagram
) are available as ADC inputs. User firmware may shut down the ADC to
Analog
MUX
Configuration and Control Registers
X1 or
X0.5
Rev. 0.3
10 bit
ADC
SAR
End of
Conversion
Interrupt
Conversion
Start
10
Window Compare
Logic
AD0BUSY (W)
Timer 0 Overflow
Timer 2 Overflow
Timer 1 Overflow
CNVSTR Input
Timer 3 Overflow
ADC Data
Registers
Window
Compare
Interrupt