◆Portable PDSのピンアサイン◆
Portableのロジック上にあるPDSコネクタのsignal assignmentsです.
ロジックボードを上から,キーボード側を手前にして見た図です.
【PDS Expansion Connector Pinout】
(Row-Pin No:Signal nameの順)
A-1,B-1,C-1:GND(Logic ground)
A-2,B-2,C-2,A-3,B-3,C-3,A-4,B-4,C-4:+5V
A-5:/DELAY.CS(*1)
B-5:/SYS.PWR(*2)
C-5:/VPA(Valid peripheral address)
A-6:/VMA(Valid memory access)
B-6:/BR(Bus request)
C-6:/BGACK(Bus grant acknowledge)
A-7:/BG(Bus grant)
B-7:/DTACK(Data transfer acknowledge)
C-7:R/W(Defines bus transfer as read or write signal)
A-8:/LDS(Lower data strobe)
B-8:/UDS(Upper data strobe)
C-8:/AS(Addres strobe)
A-9:GND(Logic ground)
B-9:+5/0V(*3)
C-9:A1(Unbuffered address bus, bit 1)
A-10:A2(Unbuffered address bus, bit 2)
B-10:A3(Unbuffered address bus, bit 3)
C-10:A4(Unbuffered address bus, bit 4)
A-11:A5(Unbuffered address bus, bit 5)
B-11:A6(Unbuffered address bus, bit 6)
C-11:A7(Unbuffered address bus, bit 7)
A-12:A8(Unbuffered address bus, bit 8)
B-12:A9(Unbuffered address bus, bit 9)
C-12:A10(Unbuffered address bus, bit 10)
A-13:A11(Unbuffered address bus, bit 11)
B-13:A12(Unbuffered address bus, bit 12)
C-13:A13(Unbuffered address bus, bit 13)
A-14:A14(Unbuffered address bus, bit 14)
B-14:A15(Unbuffered address bus, bit 15)
C-14:A16(Unbuffered address bus, bit 16)
A-15:A17(Unbuffered address bus, bit 17)
B-15:A18(Unbuffered address bus, bit 18)
C-15,A-16,B-16,B-17,C-17,A-18,B-18,C-18,A-19:reserved
C-16,A-17:nc(No connection)
B-19:+12V
C-19:D0(Unbuffered data bus, bit 0)
A-20:D1(Unbuffered data bus, bit 1)
B-20:D2(Unbuffered data bus, bit 2)
C-20:D3(Unbuffered data bus, bit 3)
A-21:D4(Unbuffered data bus, bit 4)
B-21:D5(Unbuffered data bus, bit 5)
C-21:D6(Unbuffered data bus, bit 6)
A-22:D7(Unbuffered data bus, bit 7)
B-22:D8(Unbuffered data bus, bit 8)
C-22:D9(Unbuffered data bus, bit 9)
A-23:D10(Unbuffered data bus, bit 10)
B-23:D11(Unbuffered data bus, bit 11)
C-23:D12(Unbuffered data bus, bit 12)
A-24:D13(Unbuffered data bus, bit 13)
B-24:D14(Unbuffered data bus, bit 14)
C-24:D15(Unbuffered data bus, bit 15)
A-25:+5/3.7V(*4)
B-25:+5V
C-25:GND(Logic ground)
A-26:A19(Unbuffered address bus, bit 19)
B-26:A20(Unbuffered address bus, bit 20)
C-26:A21(Unbuffered address bus, bit 21)
A-27:A22(Unbuffered address bus, bit 22)
B-27:A23(Unbuffered address bus, bit 23)
C-27:E(E (enable) clock)
A-28:FC0(Function code line 0)
B-28:FC1(Function code line 1)
C-28:FC2(Function code line 2)
A-29:/IPL0(Input priority level line 0)
B-29:/IPL1(Input priority level line 1)
C-29:/IPL2(Input priority level line 2)
A-30:/BERR(*5)
B-30:/EXT.DTACK(External data transfer acknowledge)(*6)
C-30:/SYS.RST(Initiates a system reset)
A-31,C-31,A-32,B-32,C-32:GND(Logic ground)
B-31:16M(16 MHz clock)
*1:Indicates that a wait state is inserted into the current memory cycle and you can delay a CS.
*2:A signal from the Power Manager indicating that associated circuits should tri-state their outputs and go into idle state; /SYS.PWR is pulled high (deasserted) during sleep state.
*3:Provides +5V when the system is running normally and 0V when the system is in sleep mode.
*4:Provides +5V when the system is running normally and +3.7V when the system is in sleep mode.
*5:Bus error signal generated whenever /AS remains low for more than about 250 micro seconds
*6:This signal is an input to the processor logic glue. Assertion delays external generation of the /DTACK signal.
*Apple Technote HW 12より抜粋
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