Rainbow Electronics ATA6286 - Manual (Page 5)

5
4958AS–AUTO–09/06
ATA6285/ATA6286 [Preliminary]
2.5 Pin Names
2.5.1 VCC
Supply voltage
2.5.2 GND
Ground
2.5.3 Port B (PB7..0)
Port B is a 5(8)-bit bi-directional I/O port with internal pull-up resistors (selected for each bit). The
PB7, PB6 and PB2 ports are only used as internal I/O ports for inter-die connections. The Port B
output buffers have symmetrical drive characteristics with both high sink and source current
capability. As inputs, Port B pins that are externally pulled low will source current if the pull-up
resistors are activated. The Port B pins are tri-stated when a reset condition becomes active,
even if the clock is not running.
Port B also serves the functions of various special features of the ATmegaT.
19 LF1 – – LF-receiver input 1
20 LF2 – – LF-receiver input 2
21 V
CC
– – Power supply voltage (V
CC
+ AV
CC
)
22 PC2 – PCINT10 - Port C2
23 PC1 CLKO PCINT9 System clock output Port C1
24 PC0 ECIN0 PCINT8 External Clock input 0 Port C1
25 PD0 T2ICP PCINT16 Timer2 external input capture Port D0
26 PD1 T3I PCINT17 Timer3 external input clock Port D1
27 PB0 T3ICP PCINT0 Timer3 external input capture Port B0
28 GND – – Power supply ground
29 GND – – Power supply ground
Inter-die (1) PD3 INT1 PCINT19
External Interrupt 1
→
Inter-die
connection
Port D2
Inter-die (1) PD4 ECIN1 PCINT20
External Clock input 1
→
Inter-die
connection
Port D4
Inter-die (1) PD5 T2O1 PCINT21
Timer2 Modulator output 1
→
Inter-die connection
Port D5
Inter-die (1) PD6 T2O2 PCINT22
Timer2 Modulator output 2
→
Inter-die connection
Port D6
30 PD7 SDIN PCINT23 SSI –Serial Data Input Port D7
31 PD2 INT0 PCINT18 External interrupt input 0 Port D2
32 PB3 MOSI PCINT3 SPI Port B3
Table 2-2. Pin Description (Continued)
Pin Number Pin Name
Alternate
Function 1
Alternate
Function 2 Function Comment
Note: 1. Internal inter-die connection of the MCP