ATTiny 861A pin assignment
==========================
- (MOSI/DI/SDA/!OC1A/PCINT8) PB0 MOSI,LED4 SENSE1+ PA0 (ADC0/DI/SDA/PCINT0)
- (MISO/DO/OC1A/PCINT9) PB1 MISO,PWM1 SENSE12- PA1 (ADC1/DO/PCINT1)
- (SCK/USCK/SCL/!OC1B/PCINT10) PB2 SCK,LED5 SENSE2+ PA2 (ADC2/INT1/USCK/SCL/PCINT2)
- (OC1B/PCINT11) PB3 PWM2 LED6 PA3 (AREF/PCINT3)
+ (MOSI/DI/SDA/!OC1A/PCINT8) PB0 MOSI,SERIAL PA0 (ADC0/DI/SDA/PCINT0)
+ (MISO/DO/OC1A/PCINT9) PB1 MISO,MODELED 5V_OUT PA1 (ADC1/DO/PCINT1)
+ (SCK/USCK/SCL/!OC1B/PCINT10) PB2 SCK,SW2 AMB_SENSE PA2 (ADC2/INT1/USCK/SCL/PCINT2)
+ (OC1B/PCINT11) PB3 PWMLED1 PA3 (AREF/PCINT3)
VCC AGND
GND AVCC
-(ADC7/!OC1D/CLKI/XTAL1/PCINT12) PB4 SW2 LED7 PA4 (ADC3/ICP0/PCINT4)
- (ADC8/OC1D/CLKO/XTAL2/PCINT13) PB5 PWM3 SENSE3 PA5 (ADC4/AIN2/PCINT5)
- (ADC9/INT0/T0/PCINT14) PB6 SW1 SENSE4 PA6 (ADC5/AIN0/PCINT6)
- (ADC10/RESET/PCINT15) PB7 RST SENSE5 PA7 (ADC6/AIN1/PCINT7)
+(ADC7/!OC1D/CLKI/XTAL1/PCINT12) PB4 STATUSLED PA4 (ADC3/ICP0/PCINT4)
+ (ADC8/OC1D/CLKO/XTAL2/PCINT13) PB5 PWMLED2 LED1SENSE+ PA5 (ADC4/AIN2/PCINT5)
+ (ADC9/INT0/T0/PCINT14) PB6 SW1 LED12SENSE- PA6 (ADC5/AIN0/PCINT6)
+ (ADC10/RESET/PCINT15) PB7 RST LED2SENSE+ PA7 (ADC6/AIN1/PCINT7)
+
+MISO
+MOSI
+SCK
+RST
+
+LED1 PWM
+LED1 SENSE, diff/gain 8
+
+LED2 PWM
+LED2 SENSE, diff/gain 32
+
+AMBIENT SENSE, single-ended
+BATT-V SENSE, single-ended
+
+STATUS LED (PWM?)
+
+BRAKE HALL OUT
+BRAKE HALL IN
+
+SW1
+SW2
Components
ADC Gain
-========
-single-ended resolution: 0.001074 V .. 1.1000 V
-differential resolution 8x gain: 0.000134 V .. 0.1375 V
-differential resolution 20x gain: 0.000054 V .. 0.0550 V
-differential resolution 32x gain: 0.000036 V .. 0.0344 V
+======== 0.033R sensign res.
+single-ended resolution: 0.001074 V .. 1.1000 V 32.55 .. 33333 mA
+differential resolution 8x gain: 0.000134 V .. 0.1375 V 4.06 .. 4166 mA
+differential resolution 20x gain: 0.000054 V .. 0.0550 V 1.64 .. 1666 mA
+differential resolution 32x gain: 0.000036 V .. 0.0344 V 1.09 .. 1042 mA
analog input resistance 100 MOhm
2000 mAh: 1.0 mA -> 83 days capacity
2000 mAh: 0.1 mA -> 833 days capacity
+Converter reaction
+==================
+step-up: 4-5 adc measurements to ADC voltage increase
+step-down 2: 1-2 ---""---
+timer: 34-38 ADC measurements per jiffy (200 Hz)