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HMS81C4X60 Datasheet(PDF) 35 Page - Hynix Semiconductor |
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HMS81C4X60 Datasheet(HTML) 35 Page - Hynix Semiconductor |
35 / 110 page HMS81C4x60 November 2001 Ver 1.1 33 9.2 I/O Ports Configuration R0 Ports R07 ~ R04 is an open drain bidirectional I/O port and R03 ~ R00 is a CMOS bidirectional I/O port(address 0C0H). Each I/O pin can independently used as an input or an out- put through the R0DD register (address 0C1H). The control registers for R0 are shown below. R1 Ports R1 is a 5-bit CMOS input port only(address 0C2H). Each pin can independently used as an input through the R1DD register (address 0C3H). User can use R0DD register when its bit is 0 only. The control registers for R1 are shown be- low. R1 port also can use the value bit5 ~ bit0 of AIPS register to secondary function register. R1 port have secondary functions as following table. Port R1 is multiplexed with various special features.The control registers controls the selection of alternate func- tion. After reset, this value is “0”, port may be used as nor- mal input port. The way to select alternate function such as comparator input will be shown in each peripheral section. In addition, R1 port is used as key scan function which op- erate with normal input port. Input or output is configured automatically by each func- tion register (KSMR) regardless of R1DD. R2 Port R2 is a 6-bit CMOS bidirectional I/O port (address 0C4H). Each I/O pin can independently used as an input or an out- put through the R2DD register (address 00C5H).The con- trol registers for R2 are shown below. R2 port also use the value bit5 ~ bit1 of FUNC register to secondary function register. R2 port have secondary func- R/W R03 R/W R02 R/W R04 R/W R06 R/W R05 R/W R07 R/W R01 R/W R00 ADDRESS : 00C0H RESET VALUE : Undefined R0 Data Register R0 W W W W W W W W ADDRESS : 00C1H RESET VALUE : 0000 0000b R0 Direction Register R0DD Port Direction 0: Input 1: Output R R13 R R12 R R14 R R R R R11 R R10 ADDRESS : 00C2H RESET VALUE : Undefined R1 Data Register R1 W W W W - W - W - W W ADDRESS : 00C3H RESET VALUE : ---0 0000b R1 Direction Register R1DD Port Direction 0 : use Input only MSB LSB WWWWWW WW AIPS1 AIPS2 AIPS3 AIPS4 AIPS5 - - A IPS0 AIPS INITIAL VALUE: --00 0000H ADDRESS: 00EFH AIPS.5 ~ AIPS.0 0 : R0 Port 1 : ADC Input Port Pin Alternate Function R10 R11 R12 R13 R14 AN0 (A/D input 0) AN1 (A/D input 1) AN2 (A/D input 2) AN3 (A/D input 3) AN4 (A/D input 4) R/W R23 R/W R22 R/W R24 R/W R/W R25 R/W R/W R21 R/W R20 ADDRESS : 00C4H RESET VALUE : Undefined R2 Data Register R2 W W W W - W W - W W ADDRESS : 00C5H RESET VALUE : 0000 0000b R2 Direction Register R2DD Port Direction 0: Input 1: Output INITIAL VALUE: 0000 0000b ADDRESS: 00CEH MSB LSB WWWWWW WW IN T 1S IN T2S IN T3S EC 2S EC 3S - -1 FUNC FUNC.5 ~ FUNC.1 0 : R2 Port 1 : INT mode, EC mode user m ust set 1 |
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