MEGA128CAN Datasheet, PDF (80/413 Pages) ATMEL Corporation – Microcontroller WITH 128K BYTES OF ISP FLASH AND CAN CONTROLLER

Table 43. Overriding Signals for Alternate Functions in PE3..PE0
Signal Name PE3/AIN1/OC3A PE2/AIN0/XCK0 PE1/PDO/TXD0 PE0/PDI/RXD0
PUOE
0
0
TXEN0
RXEN0
PUOV
0
0
0
PORTE0 • PUD
DDOE
0
0
TXEN0
RXEN0
DDOV
0
0
1
0
PVOE
OC3A ENABLE UMSEL0
TXEN0
0
PVOV
OC3A
XCK0 OUTPUT TXD0
0
PTOE
0
0
0
0
DIEOE
AIN1D⁽¹⁾
AIN0D⁽¹⁾
0
0
DIEOV
0
0
0
0
DI
0
XCK0 INPUT
–
RXD0
AIO
AIN1 INPUT
AIN0 INPUT
–
–
Note: 1. AIN0D and AIN1D is described in “Digital Input Disable Register 1 – DIDR1” on page
264.
Alternate Functions of Port F
The Port F has an alternate function as analog input for the ADC as shown in Table 44.
If some Port F pins are configured as outputs, it is essential that these do not switch
when a conversion is in progress. This might corrupt the result of the conversion. If the
JTAG interface is enabled, the pull-up resistors on pins PF7 (TDI), PF5 (TMS) and PF4
(TCK) will be activated even if a reset occurs.
Table 44. Port F Pins Alternate Functions
Port Pin Alternate Function
PF7
ADC7/TDI (ADC input channel 7 or JTAG Data Input)
PF6
ADC6/TDO (ADC input channel 6 or JTAG Data Output)
PF5
ADC5/TMS (ADC input channel 5 or JTAG mode Select)
PF4
ADC4/TCK (ADC input channel 4 or JTAG ClocK)
PF3
ADC3 (ADC input channel 3)
PF2
ADC2 (ADC input channel 2)
PF1
ADC1 (ADC input channel 1)
PF0
ADC0 (ADC input channel 0)
The alternate pin configuration is as follows:
• TDI, ADC7 – Port F, Bit 7
ADC7, Analog to Digital Converter, input channel 7.
80 AT90CAN128
4250E–CAN–12/04