User guide
Table Of Contents
- Features
- Pin Configurations
- Overview
- AVR CPU Core
- AVR ATmega162 Memories
- System Clock and Clock Options
- Power Management and Sleep Modes
- System Control and Reset
- Interrupts
- I/O-Ports
- Introduction
- Ports as General Digital I/O
- Alternate Port Functions
- Register Description for I/O-Ports
- Port A Data Register – PORTA
- Port A Data Direction Register – DDRA
- Port A Input Pins Address – PINA
- Port B Data Register – PORTB
- Port B Data Direction Register – DDRB
- Port B Input Pins Address – PINB
- Port C Data Register – PORTC
- Port C Data Direction Register – DDRC
- Port C Input Pins Address – PINC
- Port D Data Register – PORTD
- Port D Data Direction Register – DDRD
- Port D Input Pins Address – PIND
- Port E Data Register – PORTE
- Port E Data Direction Register – DDRE
- Port E Input Pins Address – PINE
- External Interrupts
- 8-bit Timer/Counter0 with PWM
- Timer/Counter0, Timer/Counter1, and Timer/Counter3 Prescalers
- 16-bit Timer/Counter (Timer/Counter1 and Timer/Counter3)
- Restriction in ATmega161 Compatibility Mode
- Overview
- Accessing 16-bit Registers
- Timer/Counter Clock Sources
- Counter Unit
- Input Capture Unit
- Output Compare Units
- Compare Match Output Unit
- Modes of Operation
- Timer/Counter Timing Diagrams
- 16-bit Timer/Counter Register Description
- Timer/Counter1 Control Register A – TCCR1A
- Timer/Counter3 Control Register A – TCCR3A
- Timer/Counter1 Control Register B – TCCR1B
- Timer/Counter3 Control Register B – TCCR3B
- Timer/Counter1 – TCNT1H and TCNT1L
- Timer/Counter3 – TCNT3H and TCNT3L
- Output Compare Register 1 A – OCR1AH and OCR1AL
- Output Compare Register 1 B – OCR1BH and OCR1BL
- Output Compare Register 3 A – OCR3AH and OCR3AL
- Output Compare Register 3 B – OCR3BH and OCR3BL
- Input Capture Register 1 – ICR1H and ICR1L
- Input Capture Register 3 – ICR3H and ICR3L
- Timer/Counter Interrupt Mask Register – TIMSK(1)
- Extended Timer/Counter Interrupt Mask Register – ETIMSK(1)
- Timer/Counter Interrupt Flag Register – TIFR(1)
- Extended Timer/Counter Interrupt Flag Register – ETIFR(1)
- 8-bit Timer/Counter2 with PWM and Asynchronous operation
- Serial Peripheral Interface – SPI
- USART
- Analog Comparator
- JTAG Interface and On-chip Debug System
- IEEE 1149.1 (JTAG) Boundary-scan
- Boot Loader Support – Read-While-Write Self-programming
- Features
- Application and Boot Loader Flash Sections
- Read-While-Write and No Read-While-Write Flash Sections
- Boot Loader Lock Bits
- Entering the Boot Loader Program
- Addressing the Flash During Self- programming
- Self-programming the Flash
- Performing Page Erase by SPM
- Filling the Temporary Buffer (Page Loading)
- Performing a Page Write
- Using the SPM Interrupt
- Consideration while Updating BLS
- Prevent Reading the RWW Section During Self- programming
- Setting the Boot Loader Lock Bits by SPM
- EEPROM Write Prevents Writing to SPMCR
- Reading the Fuse and Lock Bits from Software
- Preventing Flash Corruption
- Programming Time for Flash When Using SPM
- Simple Assembly Code Example for a Boot Loader
- ATmega162 Boot Loader Parameters
- Memory Programming
- Program And Data Memory Lock Bits
- Fuse Bits
- Signature Bytes
- Calibration Byte
- Parallel Programming Parameters, Pin Mapping, and Commands
- Parallel Programming
- Enter Programming Mode
- Considerations for Efficient Programming
- Chip Erase
- Programming the Flash
- Programming the EEPROM
- Reading the Flash
- Reading the EEPROM
- Programming the Fuse Low Bits
- Programming the Fuse High Bits
- Programming the Extended Fuse Bits
- Programming the Lock Bits
- Reading the Fuse and Lock Bits
- Reading the Signature Bytes
- Reading the Calibration Byte
- Parallel Programming Characteristics
- Serial Downloading
- SPI Serial Programming Pin Mapping
- Programming via the JTAG Interface
- Programming Specific JTAG Instructions
- AVR_RESET (0xC)
- PROG_ENABLE (0x4)
- PROG_COMMANDS (0x5)
- PROG_PAGELOAD (0x6)
- PROG_PAGEREAD (0x7)
- Data Registers
- Reset Register
- Programming Enable Register
- Programming Command Register
- Virtual Flash Page Load Register
- Virtual Flash Page Read Register
- Programming Algorithm
- Entering Programming Mode
- Leaving Programming Mode
- Performing Chip Erase
- Programming the Flash
- Reading the Flash
- Programming the EEPROM
- Reading the EEPROM
- Programming the Fuses
- Programming the Lock Bits
- Reading the Fuses and Lock Bits
- Reading the Signature Bytes
- Reading the Calibration Byte
- Electrical Characteristics
- ATmega162 Typical Characteristics
- Active Supply Current
- Idle Supply Current
- Power-down Supply Current
- Power-save Supply Current
- Standby Supply Current
- Pin Pull-up
- Pin Driver Strength
- Pin Thresholds and Hysteresis
- BOD Thresholds and Analog Comparator Offset
- Internal Oscillator Speed
- Current Consumption of Peripheral Units
- Current Consumption in Reset and Reset Pulsewidth
- Register Summary
- Instruction Set Summary
- Ordering Information
- Packaging Information
- Erratas
- Datasheet Change Log for ATmega162
- Table of Contents
247
ATmega162/V
2513E–AVR–09/03
Table 111. SPI Serial Programming Instruction Set
(1)
Instruction Instruction Format Operation
Byte 1 Byte 2 Byte 3 Byte4
Programming Enable
1010 1100 0101 0011 xxxx xxxx xxxx xxxx Enable SPI Serial Programming
after RESET goes low.
Chip Erase 1010 1100 100x xxxx xxxx xxxx xxxx xxxx Chip Erase EEPROM and Flash.
Read Program Memory
0010 H000 00aa aaaa bbbb bbbb oooo oooo Read H (high or low) data o from
Program memory at word address
a:b.
Load Program Memory
Page
0100 H000 00xx xxxx xxbb bbbb iiii iiii Write H (high or low) data i to
Program Memory page at word
address b. Data low byte must be
loaded before Data high byte is
applied within the same address.
Write Program Memory
Page
0100 1100 00aa aaaa bbxx xxxx xxxx xxxx Write Program Memory Page at
address a:b.
Read EEPROM Memory
1010 0000 00xx xxaa bbbb bbbb oooo oooo Read data o from EEPROM
memory at address a:b.
Write EEPROM Memory
(byte access)
1100 0000 00xx xxaa bbbb bbbb iiii iiii Write data i to EEPROM memory
at address a:b.
Load EEPROM Memory
Page (page access)
1100 0001 0000 0000 0000 00bb iiii iiii Load data i to EEPROM memory
page buffer. After data is loaded,
program EEPROM page.
Write EEPROM Memory
Page (page access)
1100 0010 00xx xxaa bbbb bb00 xxxx xxxx Write EEPROM page at address
a:b.
Read Lock Bits
0101 1000 0000 0000 xxxx xxxx xxoo oooo Read Lock bits. “0” = programmed,
“1” = unprogrammed. See Table
97 on page 230
for details.
Write Lock Bits
1010 1100 111x xxxx xxxx xxxx 11ii iiii Write Lock bits. Set bits = “0” to
program Lock bits. See Table 97
on page 230
for details.
Read Signature Byte
0011 0000 00xx xxxx xxxx xxbb oooo oooo Read Signature Byte o at address
b.
Write Fuse Bits
1010 1100 1010 0000 xxxx xxxx iiii iiii Set bits = “0” to program, “1” to
unprogram. See Table 101 on
page 232
for details.
Write Fuse High Bits
1010 1100 1010 1000 xxxx xxxx iiii iiii Set bits = “0” to program, “1” to
unprogram. See Table 100 on
page 232
for details.
Write Extended Fuse Bits
1010 1100 1010 0100 xxxx xxxx xxxx xxii Set bits = “0” to program, “1” to
unprogram. See Table 99 on
page 231
for details.
Read Fuse Bits
0101 0000 0000 0000 xxxx xxxx oooo oooo Read Fuse bits. “0” = programmed,
“1” = unprogrammed. See Table
101 on page 232
for details.