ASRock J3455M User Manual - Page 22
Platform Module TPM system, Print Port Header
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J3455M J3355M GN D +3VS B LAD0 +3V LAD3 PCIRST # FRAM E PCICLK TPM Header (17-pin TPMS1) (see p.5, No. 18) GND SERIRQ # S_PWRDWN # GN D LAD1 LAD2 SMB_DATA_MAIN SMB_CLK_MAIN GN D This connector supports Trusted Platform Module (TPM) system, 1 which can securely store keys, digital certificates, passwords, and data. A TPM system also helps enhance network security, protects digital identities, and ensures platform integrity. Print Port Header (25-pin LPT1) (see p.5, No. 15) STB# SPD0 SPD1 SPD2 SLCT PE BUSY SPD3 SPD4 SPD5 ACK# SPD6 SPD7 1 GND SLIN# PINIT# ERROR# AFD# This is an interface for print port cable that allows convenient connection of printer devices. BIOS_PH Connector (9-pin BIOS_PH) (see p.5, No. 1) SPI_DQ0 SPI_CLK SPI Power (1.8V) SPI_DQ3 GND SPI_DQ1 SPI_CS# SPI_DQ2 1 This header is for writing the BIOS into flash ROM when the BIOS ROM corrupts and the system cannot boot up. *This header is for factory engineering purpose. English 17
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