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Rev. 5.00, 09/03, page 574 of 760
18.3.5 Port E Control Register (PECR)
Bit: 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
PE7
MD1
PE7
MD0
PE6
MD1
PE6
MD0
PE5
MD1
PE5
MD0
PE4
MD1
PE4
MD0
PE3
MD1
PE3
MD0
PE2
MD1
PE2
MD0
PE1
MD1
PE1
MD0
PE0
MD1
PE0
MD0
Initial value:1/001010101010101/00
R/W: R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W
The port E control register (PECR) is a 16-bit readable/writable register that selects the pin
functions. PECR is initialized to H'AAAA (ASEMD0 = 1) or H'2AA8 (ASEMD0 = 0) by a
power-on reset, but is not initialized by a manual reset, in software standby mode, or in sleep
mode.
Bits 15 and 14—PE7 Mode 1 and 0 (PE7MD1, PE7MD0)
Bits 13 and 12—PE6 Mode 1 and 0 (PE6MD1, PE6MD0)
Bits 11 and 10—PE5 Mode 1 and 0 (PE5MD1, PE5MD0)
Bits 9 and 8—PE4 Mode 1 and 0 (PE4MD1, PE4MD0)
Bits 7 and 6—PE3 Mode 1 and 0 (PE3MD1, PE3MD0)
Bits 5 and 4—PE2 Mode 1 and 0 (PE2MD1, PE2MD0)
Bits 3 and 2—PE1 Mode 1 and 0 (PE1MD1, PE1MD0)
Bits 1 and 0—PE0 Mode 1 and 0 (PE0MD1, PE0MD0)
These bits select the pin functions and perform input pull-up MOS control.
Bit (2n + 1) Bit 2n
PEnMD1 PEnMD0 Pin Function
0 0 Reserved (n = 0, 7) (see table 18.1) (Initial value) (ASEMD0 = 0)
0 1 Port output
1 0 Port input (Pull-up MOS: on) (Initial value) (ASEMD0 = 1)
1 1 Port input (Pull-up MOS: off)
(n = 0, 7)
Bit (2n + 1) Bit 2n
PEnMD1 PEnMD0 Pin Function
0 0 Other function (n = 2, 4, 5) (see table 18.1), Reserved (n = 1, 3, 6)
0 1 Port output
1 0 Port input (Pull-up MOS: on) (Initial value)
1 1 Port input (Pull-up MOS: off)
(n = 1 to 6)