HD643303x Hitachi, HD643303x Datasheet - Page 294

• Manufacturer Part Number: HD643303x
• Description: Hitachi Microcomputer
• Manufacturer: Hitachi

9.2.7 Next Data Enable Register A (NDERA)
NDERA is an 8-bit readable/writable register that enables or disables TPC output groups 1 and 0
(TP
If a bit is enabled for TPC output by NDERA, then when the ITU compare match event selected
in the TPC output control register (TPCR) occurs, the NDRA value is automatically transferred to
the corresponding PADR bit, updating the output value. If TPC output is disabled, the bit value is
not transferred from NDRA to PADR and the output value does not change.
NDERA is initialized to H'00 by a reset and in hardware standby mode. It is not initialized in
software standby mode.
Bits 7 to 0—Next Data Enable 7 to 0 (NDER7 to NDER0): These bits enable or disable TPC
output groups 1 and 0 (TP
Bits 7 to 0
NDER7 to NDER0
0
1
Bit
Initial value
Read/Write
7
to TP
0
) on a bit-by-bit basis.
NDER7
R/W
7
0
Description
TPC outputs TP
(NDR7 to NDR0 are not transferred to PA
TPC outputs TP
(NDR7 to NDR0 are transferred to PA
7
to TP
NDER6
R/W
6
0
0
) on a bit-by-bit basis.
NDER5
R/W
7
7
5
0
to TP
to TP
Next data enable 7 to 0
These bits enable or disable
TPC output groups 1 and 0
279
NDER4
0
0
are disabled
are enabled
R/W
4
0
NDER3
R/W
3
0
7
to PA
7
NDER2
to PA
R/W
0
)
2
0
0
)
NDER1
R/W
1
0
(Initial value)
NDER0
R/W
0
0