CHAPTER 3 FUNCTIONAL OUTLINE
PRELIMINARY
NEC confidential and Proprietary
109
3.7 Transmitting Pseudo Frame for Testing
The
µ
PD98413 can internally generate and transmit a pseudo frame that causes the errors listed in Table 3-21 in
the opposing device. This function is useful for testing the system, and can be executed by using the pseudo error
register.
Table 3-21. Pseudo Error Frame
Target Error
Pseudo Frame
Name
Register for transmit
Pseudo frame
Description of Transmit Frame
LOS
PLOS frame
PESOH register
Fixes transmit data to 00H.
OOF/LOF
POOF frame
PESOH register
Fixes A1 and A2 bytes to 00H.
LOP
PLOP frame
PEPTR register
Fixes H1, H2, and H3 bytes to FF, FE, and FFH.
OCD, LCD
POCD frame
PEATM register
Maps cell with LSB in HEC field inverted.
B1 error
PB1 frame
PESOH register
Inverts any bits of B1 byte.
Inverted bits are set in the PESOH register.
µ
PD98413 inverts the
corresponding bits of B1 byte by the PB1[7:0] bits of the PESOH
register. If set to “01H” in the PB1[7:0] field, the LSB bit of the B1
byte is inverted.
B2 error
PB2 frame
PELOH register
Inverts any bits of 12
th
B2 byte.
Inverted bits are set in the PELOH register.
µ
PD98413 inverts the
corresponding bits of 1
st
B2 throw 12th B2 byte by the PB2[7:0] bits
of the PELOH register. If set to “01H” in the PB2[7:0] field, the LSB
bit of the B2 byte is inverted.
B3 error
PB3 frame
PEPOH register
Inverts any bits of B3 byte.
Inverted bits are set in the PEPOH register.
µ
PD98413 inverts the
corresponding bits of B3 byte by PB3[7:0] bits of the PEPOH
register, If set to “01H” in the PB3[7:0] field, the LSB bit of the B3
byte is inverted.
Line REI
PLREI frame
PELOH register
Sets M1 byte to the value set in the PM1[7:0] bits of the PELOH
register for transmission.
Path REI
PPREI frame
PEPOH register
Sets bits 1 to 4 of G1 byte to the value set in the PG1[3:0] bits of the
PEPOH register for transmission.
Summary of Contents for UPD98413
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