CHAPTER 3 FUNCTIONAL OUTLINE
PRELIMINARY
NEC confidential and Proprietary
100
3.6 Transmission/Reception of J0/J1 Trace Message
The J0 byte of SOH and J1 byte of POH are used to transfer 16-byte or 64-byte trace messages.
µ
PD98413 has
a function for transmitting or receiving these trace messages.
J0: Section trace message
J1: Path trace message
3.6.1 Transmitting Trace Message
The
µ
PD98413 has a message buffers for each of J0 and J1 to set trace messages. A new message is set to
Expected buffer; a trace message is transmitted from buffer.
Table 3-19 Register and bits related trace message transmit
Register and Bit of Section trace
message
Classificati
on
Section (J0)
Path (J1)
R/W Outline
Mode
MDSOHT
register
J0SZ bit
MDPOHT
register
J1SZ bit
R/W
Selection of 16- or 64-byte length
BSEL bit
BSEL bit
R/W
Selection of J0 buffer or J1 buffer
Buffer
select
TMBT
register
BADR bits
BADR bits
R/W
Set the offset address of the trace message buffer
Buffer
Access
register
TMDT
register
BDAT bit
BDAT bit
R/W
Access to Accepted buffer,
Transmit
command
CMTMT
register
J0STAT bit
J1STAT bit
R/W
Start to transmit new trace massage.
Содержание UPD98413
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