ATmega16HVB Atmel Corporation, ATmega16HVB Datasheet - Page 19

• Manufacturer Part Number: ATmega16HVB
• Manufacturer: Atmel Corporation

Specifications of ATmega16HVB

• Flash (kbytes): 16 Kbytes
• Pin Count: 44
• Max. Operating Frequency: 8 MHz
• Cpu: 8-bit AVR
• # Of Touch Channels: 8
• Hardware Qtouch Acquisition: No
• Max I/o Pins: 17
• Ext Interrupts: 15
• Usb Speed: No
• Usb Interface: No
• Spi: 1
• Twi (i2c): 1
• Graphic Lcd: No
• Video Decoder: No
• Camera Interface: No
• Adc Channels: 8
• Adc Resolution (bits): 12
• Adc Speed (ksps): 1.9
• Resistive Touch Screen: No
• Temp. Sensor: Yes
• Crypto Engine: No
• Sram (kbytes): 1
• Eeprom (bytes): 512
• Self Program Memory: YES
• Dram Memory: No
• Nand Interface: No
• Picopower: No
• Temp. Range (deg C): -40 to 85
• I/o Supply Class: 4.0 to 25
• Operating Voltage (vcc): 4.0 to 25
• Fpu: No
• Mpu / Mmu: no / no
• Timers: 2
• Output Compare Channels: 4
• Input Capture Channels: 2
• 32khz Rtc: No
• Calibrated Rc Oscillator: Yes

11. Errata
11.1
11.1.1
11.1.2
11.2
11.2.1
11.2.2
8042CS–AVR–06/11
The Atmel ATmega16HVB
The Atmel ATmega32HVB
Rev. B
Rev. A
Rev. B
Rev. A
Stack pointer initial value
The stack pointer in ATmega16HVB is incorrectly initialized to 0x08ff instead of 0x04ff.
TWI bus can get stuck if TWI STOP condition bit is set in slave mode
If the TWSTO bit in TWCR is set while the TWI starts to receive data in slave mode, it can result
in pulling the SCL pin low and then the TWI bus will get stuck. To release the SCL pin and get
out of this situation the TWI module needs to be disabled and then re-enabled.
Not sampled.
No known errata.
Not sampled.
Problem fix/workaround
Initialize the stack pointer in software before the stack is used. Most C-compilers does initial-
ize the stack pointer without manual intervention.
Assembly Code Example:
ldi r16,high(RAMEND) ; Main program start out SPH,r16 ; Set Stack Pointer to top of RAM
ldi r16,low(RAMEND) out SPL,r16 C Code Example (if required): SP = RAMEND;
Problem fix/workaround
While in slave mode the TWSTO bit should be written only to recover from an error condition
and then cleared before a data transfer starts.
ATmega16HVB/32HVB
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