ASROCK B550M-HDV Manual page 30

ATX 12V Power
Connector
(4-pin ATX12V1)
(see p.1, No. 1)
Serial Port Header
(9-pin COM1)
(see p.1, No. 15)
SPI TPM Header
(13-pin SPI_TPM_J1)
(see p.1, No. 18)
28
RRXD1
DDTR#1
DDSR#1
CCTS#1
1
RRI#1
RRTS#1
GND
TTXD1
DDCD#1
SPI_DQ3
+3.3V
Dummy
CLK
SPI_MOSI
RST#
TPM_PIRQ
1
SPI_TPM_CS#
GND
RSMRST#
SPI_MISO
SPI_CS0
SPI_DQ2
Please connect an ATX
12V power supply to this
connector.
*The power supply plug
fits into this connector in
only one orientation.
This COM1 header
supports a serial port
module.
This connector supports SPI
Trusted Platform Module (TPM)
system, which can securely store
keys, digital certificates, pass-
words, and data. A TPM system
also helps enhance network
security, protects digital
identities, and ensures platform
integrity.