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STPC4EDBI 数据表(PDF) 22 Page - STMicroelectronics |
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STPC4EDBI 数据表(HTML) 22 Page - STMicroelectronics |
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22 / 93 page  PIN DESCRIPTION 22/93 Release 1.5 - January 29, 2002 .. Table 2-4. ISA / IDE Dynamic Multiplexing ISA BUS (ISAOE# = 0) IDE (ISAOE# = 1) RMRTCCS# DD[15] KBCS# DD[14] RTCRW# DD[13] RTCDS# DD[12] SA[19:8] DD[11:0] LA[23] SCS3# LA[22] SCS1# SA[21] PCS3# SA[20] PCS1# LA[19:17] DA[2:0] IOCHRDY DIORDY Table 2-5. ISA / Local Bus Pin Sharing ISA / IPC LOCAL BUS SD[15:0] PD[15:0] DREQ_MUX[1:0] PA[21:20] SMEMR# PA[19] MEMW# PA[18] BHE# PA[17] AEN PA[16] ALE PA[15] MEMR# PA[14] IOR# PA[13] IOW# PA[12] REF# PA[11] IOCHCK# PA[10] GPIOCS# PA[9] ZWS# PA[8] SA[7:4] PA[7:4] TC, DACK_ENC[2:0] PA[3:0] SA[3] PRDY ISAOE#,SA[2:0] IOCS#[3:0] DEV_CLK, RTCAS FCS#[1:0] IOCS16#, MASTER# PRD#[1:0] SMEMW#, MCS16# PWR#[1:0] Table 2-6. Signal value on Reset Signal Name SYSRSTI# active SYSRSTI# inactive SYSRSTO# active release of SYSRSTO# BASIC CLOCKS AND RESETS XTALO 14MHz ISA_CLK Low 7MHz ISA_CLK2X 14MHz OSC14M 14MHz DEV_CLK 24MHz HCLK Oscillating at the speed defined by the strap options. PCI_CLKO HCLK divided by 2 or 3, depending on the strap options. DCLK 17MHz MEMORY CONTROLLER MCLKO 66MHz if asynchonous mode, HCLK speed if synchronized mode. CS#[3:1] High CS#[0] High SDRAM init sequence: Write Cycles MA[10:0], BA[0] 0x00 RAS#[1:0], CAS#[1:0] High MWE#, DQM[7:0] High MD[63:0] Input PCI INTERFACE AD[31:0] 0x0000 First prefetch cycles when not in Local Bus mode. CBE[3:0], PAR Low FRAME#, TRDY#, IRDY# Input STOP#, DEVSEL# Input PERR#, SERR# Input |
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