Transmitting Pseudo Frame For Testing - NEC UPD98413 User Manual

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.
Target Error Pseudo Frame
Name
LOS PLOS frame
OOF/LOF POOF frame
LOP PLOP frame
OCD, LCD POCD frame
B1 error PB1 frame
B2 error PB2 frame
B3 error PB3 frame
Line REI PLREI frame
Path REI PPREI frame
CHAPTER 3 FUNCTIONAL OUTLINE
Table 3-21. Pseudo Error Frame
Register for transmit
Pseudo frame
PESOH register Fixes transmit data to 00H.
PESOH register Fixes A1 and A2 bytes to 00H.
PEPTR register Fixes H1, H2, and H3 bytes to FF, FE, and FFH.
PEATM register Maps cell with LSB in HEC field inverted.
PESOH register Inverts any bits of B1 byte.
Inverted bits are set in the PESOH register. µPD98413 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.
PELOH register Inverts any bits of 12
Inverted bits are set in the PELOH register. µPD98413 inverts the
corresponding bits of 1
of the PELOH register. If set to "01H" in the PB2[7:0] field, the LSB
bit of the B2 byte is inverted.
PEPOH register Inverts any bits of B3 byte.
Inverted bits are set in the PEPOH register. µPD98413 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.
PELOH register Sets M1 byte to the value set in the PM1[7:0] bits of the PELOH
register for transmission.
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.
PRELIMINARY
Description of Transmit Frame
th
B2 byte.
st
B2 throw 12th B2 byte by the PB2[7:0] bits
NEC confidential and Proprietary
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