z85c30 ZiLOG Semiconductor, z85c30 Datasheet - Page 19

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

PS011705-0608
Table 1. SCC Read Register Functions
Table 2. SCC Write Register Functions
Register
RR0
RR1
RR2
RR3
RR8
RR10
RR12
RR13
RR15
Register
WR0
WR1
WR2
WR3
WR4
WR5
WR6
WR7
WR7*
WR8
WR9
WR10
Function
CRC initialize, initialization commands for the various
modes, register pointers
Transmit/Receive interrupt and data transfer mode
definition
Interrupt vector (accessed through either channel)
Receive parameters and control
Transmit/Receive miscellaneous parameters and
modes
Transmit parameters and controls
Sync characters or SDLC address field
Sync character or SDLC flag
Extended Feature and FIFO Control (WR7 Prime)
85C30 Only
Transmit buffer
Master interrupt control and reset (accessed through
either channel)
Miscellaneous transmitter/receiver control bits
Function
Transmit/Receive buffer status and External status
Special Receive Condition status
Modified interrupt vector (Channel B only) Unmodified
interrupt vector (Channel A only)
Interrupt Pending bits (Channel A only)
Receive Buffer
Miscellaneous status
Lower byte of Baud Rate Generator time constant
Upper byte of Baud Rate Generator time constant
External/Status interrupt information
CMOS SCC Serial Communications Controller
Product Specification
Functional Description
15