ATmega32C1 Automotive Atmel Corporation, ATmega32C1 Automotive Datasheet - Page 258

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ATmega32C1 Automotive

Manufacturer Part Number
ATmega32C1 Automotive
Description
Manufacturer
Atmel Corporation

Specifications of ATmega32C1 Automotive

Flash (kbytes)
32 Kbytes
Pin Count
32
Max. Operating Frequency
16 MHz
Cpu
8-bit AVR
# Of Touch Channels
12
Hardware Qtouch Acquisition
No
Max I/o Pins
27
Ext Interrupts
27
Usb Speed
No
Usb Interface
No
Spi
1
Uart
1
Can
1
Lin
1
Graphic Lcd
No
Video Decoder
No
Camera Interface
No
Adc Channels
11
Adc Resolution (bits)
10
Adc Speed (ksps)
125
Analog Comparators
4
Resistive Touch Screen
No
Dac Channels
1
Dac Resolution (bits)
10
Temp. Sensor
Yes
Crypto Engine
No
Sram (kbytes)
2
Eeprom (bytes)
1024
Self Program Memory
YES
Dram Memory
No
Nand Interface
No
Picopower
No
Temp. Range (deg C)
-40 to 150
I/o Supply Class
2.7 to 5.5
Operating Voltage (vcc)
2.7 to 5.5
Fpu
No
Mpu / Mmu
no / no
Timers
2
Output Compare Channels
4
Input Capture Channels
1
Pwm Channels
4
32khz Rtc
No
Calibrated Rc Oscillator
Yes
19. ISRC - Current Source
19.1
258
Features
Atmel ATmega16/32/64/M1/C1
The ATmega16/32/64/M1/C1 features a 100µA ±5% Current Source. After RESET or up on
request, the current is flowing through an external resistor. The voltage can be measured on
the dedicated pin shared with the ADC. Using a resistor in serie with a
ommended. To protect the device against big values, the ADC must be configured with AVcc
as internal reference to perform the first measurement. Afterwards, another internal reference
can be chosen according to the previous measured value to refine the result.
When ISRCEN bit is set, the ISRC pin sources 100µA. Otherwise this pin keeps its initial
function.
Figure 19-1. Current Source Block Diagram
AREF Internal Circuit
100µA Constant current source
±6% Absolute Accuracy
ADC Input
100 uA
AREFEN
AVCC
ISRCEN
AREF / ISRC
External
Resistor
0.5% tolerance is rec-
7647G–AVR–09/11

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