LPC2131/2132/2138 User Manual - mct.net

Philips Semiconductors Preliminary User Manual
ARM-based Microcontroller
3 External Match 3
LPC2131/2132/2138
Table 133: External Match Register (EMR: TIMER0 - T0EMR: 0xE000403C; TIMER1 - T1EMR: 0xE000803C)
EMR Function Description
5:4
7:6
9:8
11:10
External Match
Control 0
External Match
Control 1
External Match
Control 2
External Match
Control 3
Table 134: External Match Control
This bit reflects the state of output MAT0.3/MAT1.3, whether or not this output is
connected to its pin. When a match occurs for MR3, this output of the timer can either
toggle, go low, go high, or do nothing. Bits EMR[10:11] control the functionality of this
output.
Determines the functionality of External Match 0. Table 134 shows the encoding of
these bits.
Determines the functionality of External Match 1. Table 134 shows the encoding of
these bits.
Determines the functionality of External Match 2. Table 134 shows the encoding of
these bits.
Determines the functionality of External Match 3. Table 134 shows the encoding of
these bits.
EMR[11:10], EMR[9:8],
EMR[7:6], or EMR[5:4]
Function
0 0 Do Nothing
0 1 Clear corresponding External Match output to 0 (LOW if pinned out)
1 0 Set corresponding External Match output to 1(HIGH if pinned out)
1 1 Toggle corresponding External Match output
Reset
Value
Timer/Counter0 and Timer/Counter1 182 November 22, 2004
0
0
0
0
0