Intel VC820 Design Guide - Page 194
Power Connector, ATX Connector, Reset Button
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8 7 6 5 4 3 2 1 Power Connector ITP Reset circuit. For debug only. D 74LVC14A has 5V input tolerance. D VCC3_3SBY VCC3_3SBY VCC3_3SBY VCC5SBY VCC3_3SBY VCC12- VCC3_3 ATX Connector VCC5SBY VCC12 J24 U15 14 1 74LVC14A7 U15 14 2 POK_U1 3 74LVC14A7 4 POK_U2 1 14 2 U3 3 POK_U3 SN74LVC087A 4.7K R347 U20 14VCC 9,29 SLP_S3# 5 6 SN74LVC06A7 GND VCC5 SLP_S3 C SN74LVC06A has 5V output tolerance. 11 3_3V11 3_3V1 1 12 -12V 3_3V2 2 13 GND13 GND3 3 14 PS_0N ATX 5V4 4 15 GND15 GND5 5 16 GND16 5V6 6 17 GND17 GND7 7 18 -5V PW_OK 8 19 5V19 5VSB 9 20 5V20 12V 10 DBRESET# 4 330 ohm pullup to VCC3_3 located on CPU sheet. R339 0K VCC2_5 VCC3_3SBY C SN74LVC06A has 5V input tolerance. R96 330 VCC5SBY U20 14VCC 1 2 SN74LVC06A7 GND PWRGOOD 4 ATX_PWOK R342 ATX_PWOK_R 0K No stuff R342 when ITP is used. U18 74LS1932 14VCC 8 10 7 GND PWROK_INV VCC3_3SBY VCC3_3SBY 4.7K R349 VRM_PWRGD 4,28 B Reset Button SW2 JP12 RSTBTN_SW R343 22 C335 0.01UF C328 10UF A 8 7 6 220 ohm pullup to VCC3_3 is located on VRM sheet. U20 14VCC 3 4 SN74LVC06A7 GND PWROK 7,9,16,29 B 1M R348 VCC3_3SBY VCC3_3SBY VCC3_3SBY No stuff. For test only R251 22K RSMRST_U U15 14 5 6 74LVC14A7 C266 1UF U15 14 RSMRST 9 8 74LVC14A7 Resume Reset circuitry using a 22 msec delay and Schmitt trigger logic. 5 4 R288 1M RSMRST# 9,17 No stuff. For test only A TITLE: INTEL(R) 820 CHIPSET CUSTOMER REFERENCE BOARD REV: POWER CONNECTOR 1.01 R PCD PLATFORM DESIGN DRAWN BY: PROJECT: 1900 PRAIRIE CITY ROAD FOLSOM, CALIFORNIA 95630 LAST REVISED: SHEET: 11-18-1999_11:28 31 OF 36 3 2 1