Micronas SDA 6000, User Manual

Page: 153 / 412

SDA 6000
PRELIMINARY DATA SHEET
Version 2.1
System Control & Configuration
6 - 33 Micronas
Alternate Functions of Port 3
The pins of Port 3 serve various functions which include external timer control lines and
the 3 serial interfaces.
The table below summarizes the alternate functions of Port 3.
Port 4
Port 4 is a 6-bit output port. Because of its high frequency requirements in the alternate
function mode, it has different electrical characteristics than the other ports.
During reset, the user specific portion of the system start-up configuration is input via
Port 4. The complete configuration (user specific as well as hardwired settings) can be
read at runtime from register RP0H. For a detailed description refer to
Chapter 6.1 .
Bit Function
ODP3.y Port 3 Open Drain control register bit y
ODP3.y = 0: Port line P3.y output driver in push/pull mode.
ODP3.y = 1: Port line P3.y output driver in open drain mode.
Port 3 Pin Alternate Function
P3.0
P3.1
P3.2
P3.3
P3.4
P3.5
P3.6
P3.7
P3.8
P3.9
P3.10
P3.11
P3.12
P3.13
P3.14
P3.15 SCL0 I
2
C - bus clock line 0
SDA0 I
2
C - bus data line 0
CAPIN GPT2 capture input
T3OUT Timer 3 Toggle output
T3EUD Timer 3 External Up/Down input
T4IN Timer 4 Count input
T3IN Timer 3 Count input
T2IN Timer 2 Count input
MRST SSC Master receive/Slave transmit
MTSR SSC Master transmit/Slave receive
TxD0 ASC0 Transmit data output
RxD0 ASC0 Receive data input
--- No alternate function
SCLK SSC Shift Clock input/output
--- Not implemented. No pin assigned!
LED2 No alternate function