ATMEGA128-16AI Atmel, ATMEGA128-16AI Datasheet - Page 76

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

Specifications of ATMEGA128-16AI

• 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: -40°C ~ 85°C
• Package / Case: 64-TQFP, 64-VQFP
• For Use With: ATSTK501 - ADAPTER KIT FOR 64PIN AVR MCU
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Other names: Q1167170A

Alternate Functions of
Port C
76
ATmega128
In ATmega103 compatibility mode, Port C is output only. The ATmega128 is by default shipped
in compatibility mode. Thus, if the parts are not programmed before they are put on the PCB,
PORTC will be output during first power up, and until the ATmega103 compatibility mode is dis-
abled. The Port C has an alternate function as the address high byte for the External Memory
Interface.
Table 33. Port C Pins Alternate Functions
Table 34
Figure 33 on page
Table 34. Overriding Signals for Alternate Functions in PC7..PC4
Note:
Signal
Name
PUOE
PUOV
DDOE
DDOV
PVOE
PVOV
DIEOE
DIEOV
DI
AIO
1. XMM = 0 in ATmega103 compatibility mode.
and
Port Pin
PC7/A15
SRE • (XMM
0
SRE • (XMM<1)
1
SRE • (XMM<1)
A15
0
0
–
–
PC7
PC6
PC5
PC4
PC3
PC2
PC1
PC0
Table 35
70.
(1)
relate the alternate functions of Port C to the overriding signals shown in
<1)
Alternate Function
A15
A14
A13
A12
A11
A10
A9
A8
PC6/A14
SRE • (XMM<2)
0
SRE • (XMM<2)
1
SRE • (XMM<2)
A14
0
0
–
–
PC5/A13
SRE • (XMM<3)
0
SRE • (XMM<3)
1
SRE • (XMM<3)
A13
0
0
–
–
PC4/A12
SRE • (XMM<4)
0
SRE • (XMM<4)
1
SRE • (XMM<4)
A12
0
0
–
–
2467V–AVR–02/11