function will make the mater to expand interrupt pins very easily.
I/O Port 1
Name
P1
Bit 7
P17
Bit 6
P16
Bit 5
P15
Bit 4
P14
Bit 3
P13
Bit 2
P12
Bit 1
P11
Bit 0
P10
Port P1 input or output status register.
Name
P1CR
Bit 7
-
Bit 6
-
Bit 5
-
Bit 4
-
Bit 3
-
Bit 2
-
Bit 1
CR11
Bit 0
CR10
Port P1 I/O control register.
P1CR.0: P1.0 ~ P1.3 is input or output, 0: input, 1: output
P1CR.1: P1.4 ~ P1.7 is input or output, 0: input, 1: output
Name
P1POR
Bit 7
-
Bit 6
-
Bit 5
-
Bit 4
-
Bit 3
-
Bit 2
-
Bit 1
PO11
Bit 0
PO10
Port P1 pull high/output mode control register.
If P1CR.x == 0 (input mode)
P1POR.0: P1.0 ~ P1.3 pull high control, 0: enable (large resistance, 350K), 1: disable
P1POR.1: P1.4 ~ P1.7 pull high control, 0: enable (large resistance, 350K), 1: disable
If P1CR.x == 1 (output mode)
P1POR.0: P1.0 ~ P1.3 CMOS/NMOS selector, 0: CMOS, 1: NMOS
P1POR.1: P1.4 ~ P1.7 CMOS/NMOS selector, 0: CMOS, 1: NMOS
Name
P1PSR
Bit 7
-
Bit 6
-
Bit 5
-
Bit 4
-
Bit 3
-
Bit 2
-
Bit 1
PS11
Bit 0
PS10
Port P1 strong pull high selection register.
If P1CR.x == 0 (input mode)
P1PSR.0: P1.0 ~ P1.3 strong pull high control, 0: disable, 1: enable (small resistance, 50K)
P1PSR.1: P1.4 ~ P1.7 strong pull high control, 0: disable, 1: enable (small resistance, 50K)
Name
P1SCR
Bit 7
-
Bit 6
-
Bit 5
-
Bit 4
-
Bit 3
-
Bit 2
-
Bit 1
SC11
Bit 0
SC10
Port P1 sink control register.
If P1CR.x == 1 (output mode)
P1SCR.0: P1.0 ~ P1.3 output sink ability control, 0: weak, 1: strong (large sink current)
P1SCR.1: P1.4 ~ P1.7 output sink ability control, 0: weak, 1: strong (large sink current)
6
MA009A Technical Summary
MEGAWIN
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