Z80180/Z8S180/Z8L180
Enhanced Z180 Microprocessor
Zilog
Bit 2 LNIO. This bit controls the drive capability of certain
external I/O pins of the Z8S180/Z8L180. When this bit is
set to 1, the output drive capability of the following pins is
reduced to 33percent of the original drive capability:
Bit 0 LNAD/DATA. This bit controls the drive capability of
the Address/Data bus output drivers. If this bit is set to 1,
the output drive capability of the Address and Data bus
output is reduced to 33percent of its original drive
capability.
–
–
–
–
–
–
/RTSO/TxS
CKA1
CKAO
TXAO
TXAI
TOUT
Bit 1 LNCPUCTL. This bit controls the drive capability of
the CPU Control pins. When this bit is set to 1, the output
drive capability of the following pins is reduced to
33percent the original drive capability:
–
–
–
–
–
–
–
–
/BUSACK
/RD
/WR
/M1
/MREQ
/IORQ
/RFSH
/HALT
1-36
P R E L I M I N A R Y
DS971800401
ZILOG [ ZILOG, INC. ]
