z85c30 ZiLOG Semiconductor, z85c30 Datasheet - Page 10

• Manufacturer Part Number: z85c30
• Description: Cmos Scc Serial Communications Controller
• Manufacturer: ZiLOG Semiconductor

Pin Descriptions
PS011705-0608
Z85C30/Z80C30 Common Pin Functions
The following sections describe the pin functions common to Z85C30 and
Z80C30 devices:
Each pin function is described below.
CTSA, CTSB
Clear To Send (inputs, active Low) —
Low on the inputs enables the respective transmitters. If not programmed as Auto Enable,
these pins can be used as general-purpose inputs. Both inputs are Schmitt-trigger buffered
to accommodate slow rise-time inputs. The SCC detects pulses on these inputs and can
interrupt the CPU on both logic level transitions.
DCDA, DCDB
Data Carrier Detect (inputs, active Low) —
programmed for Auto Enable. Otherwise, these pins are used as general-purpose input
pins. Both pins are Schmitt-trigger buffered to accommodate slow rise-time signals.
The SCC detects pulses on these pins and can interrupt the CPU on both logic level
transitions.
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CTSA, CTSB
DCDA, DCDB
DTR/REQA, DTR/REQB
IEI
IEO
INT
INTACK
PCLK
RxDA, RxDB
RTxCA, RTxCB
RTSA, RTSB
SYNCA, SYNCB
TxDA, TxDB
TRxCA, TRxCB
W/REQA, W/REQB
CMOS SCC Serial Communications Controller
If these pins are programmed for Auto Enable, a
These pins function as receiver enables if
Product Specification
General Description
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