ATMEGA128-16MC Atmel, ATMEGA128-16MC Datasheet - Page 257

• Manufacturer Part Number: ATMEGA128-16MC
• Description: IC AVR MCU 128K 16MHZ COM 64-QFN
• Manufacturer: Atmel
• Series: AVR® ATmegar

Specifications of ATMEGA128-16MC

• Core Processor: AVR
• Core Size: 8-Bit
• Speed: 16MHz
• Connectivity: EBI/EMI, I²C, SPI, UART/USART
• Peripherals: Brown-out Detect/Reset, POR, PWM, WDT
• Number Of I /o: 53
• Program Memory Size: 128KB (64K x 16)
• Program Memory Type: FLASH
• Eeprom Size: 4K x 8
• Ram Size: 4K x 8
• Voltage - Supply (vcc/vdd): 4.5 V ~ 5.5 V
• Data Converters: A/D 8x10b
• Oscillator Type: Internal
• Operating Temperature: 0°C ~ 70°C
• Package / Case: 64-MLF®, 64-QFN
• For Use With: ATAVRISP2 - PROGRAMMER AVR IN SYSTEMATSTK501 - ADAPTER KIT FOR 64PIN AVR MCU
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

Boundary-scan and
the Two-wire Interface
2467V–AVR–02/11
Figure 125. General Port Pin Schematic diagram
The two Two-wire Interface pins SCL and SDA have one additional control signal in the scan-
chain; Two-wire Interface Enable – TWIEN. As shown in
a tri-state buffer with slew-rate control in parallel with the ordinary digital port pins. A general
scan cell as shown in
Notes:
1. A separate scan chain for the 50 ns spike filter on the input is not provided. The ordinary scan
2. Make sure the OC and TWIEN signals are not asserted simultaneously, as this will lead to
support for digital port pins suffice for connectivity tests. The only reason for having TWIEN in
the scan path, is to be able to disconnect the slew-rate control buffer when doing boundary-
scan.
drive contention.
See Boundary-Scan description
Pxn
for details!
Figure 130
PUD:
PUExn:
OCxn:
ODxn:
IDxn:
SLEEP:
IDxn
PULLUP DISABLE
PULLUP ENABLE for pin Pxn
OUTPUT CONTROL for pin Pxn
OUTPUT DATA to pin Pxn
INPUT DATA from pin Pxn
SLEEP CONTROL
is attached to the TWIEN signal.
PUExn
SLEEP
OCxn
ODxn
SYNCHRONIZER
D
L
WDx:
RDx:
WPx:
RRx:
RPx:
CLK
Q
Q
I/O
Figure
:
D
WRITE DDRx
READ DDRx
WRITE PORTx
READ PORTx REGISTER
READ PORTx PIN
I/O CLOCK
PINxn
Q
Q
126, the TWIEN signal enables
RESET
RESET
Q
Q
Q
Q
PORTxn
DDxn
CLR
CLR
D
D
ATmega128
CLK
PUD
WDx
RDx
WPx
RRx
RPx
I/O
257