NXP Semiconductors
UM10858
PN7462 family HW user manual
UM10858
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© NXP B.V. 2018. All rights reserved.
User manual
COMPANY PUBLIC
Rev. 1.4 — 14 May 2018
314514
260 of 345
Bit
Symbol
Access Reset
Value
Description
7:0
RX_CRC_INIT
R/W
0xFF
RX CRC init value. Only used if
RX_SET_CRC is set
14.2.9.6 SPIM_TX_BUFFER_REG
This register is used to configure the TX buffer.
Table 300. SPIM_TX_BUFFER_REG (address offset 0x0014)
Bit
Symbol
Access Reset
Value
Description
31:23
RESERVED
R
0
Reserved
22:14
TX_LENGTH
R
0
Size of TX transfer.
TX_LENGTH = 0: TX transfer of size
0 is allowed only if
TX_APPEND_CRC is set
TX_LENGTH = 1: TX transfer
payload of size 1 byte
TX_LENGTH = 2: TX transfer
payload of size 2 byte
…
TX_LENGTH = 511: TX transfer
payload of size 511 byte
13:0
TX_START_ADDR
R/W
0
Byte start address of TX buffer:
staTX_length must not
exceed maximum address range
14.2.9.7 SPIM_TX_BUFFER_CRC_REG
This register is used to configure TX CRC.
Table 301. SPIM_TX_BUFFER_CRC_REG (address offset 0x0018)
Bit
Symbol
Access Reset
Value
Description
31:18
RESERVED
R
0
Reserved
17
TX_APPEND_CRC
R/W
1
1: CRC is sent after transmission of
TX_LENGTH bytes. If TX_LENGTH
is 0, then only CRC will be sent.
16:8
TX_CRC_PAYLOAD_OFFSE
T
R/W
0x01
Number of bytes to skip for CRC
computation
7:0
TX_CRC_INIT
R/W
0xFF
TX CRC init value. Only used if
TX_SET_CRC is set