z85c30 ZiLOG Semiconductor, z85c30 Datasheet - Page 33

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

PS011705-0608
Write Register 0 (non-multiplexed bus mode)
Write Register 0 (multiplexed bus mode)
D7 D6 D5 D4 D3 D2 D1 D0
D7 D6 D5 D4 D3 D2 D1 D0
1
1
0
0
0
0
1
1
* With Point High Command
* B Channel Only
0
1
0
1
0
1
0
1
Reset Tx CRC Generator
Reset Tx Underrun/EOM Latch
Null Code
Reset Rx CRC Checker
0
0
0
0
1
1
1
1
0
0
1
1
1
0
0
1
Null Code
Reset Rx CRC Checker
Reset Tx CRC Checker
Reset Tx Underrun/EOM Latch
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
1
0
1
0
1
0
1
1
0
1
0
1
0
0
1
Null Code
Point High
Reset Ext/Status Interrupts
Send Abort (SDLC)
Reset Tx Int Pending
Error Reset
Reset Highest IUS
Enable Int on Next Rx Character
Null Code
Send Abort
Reset Highest IUS
Null Code
Reset Ext/Status Interrupts
Enable Int on Next Rx Character
Reset Tx Int Pending
Error Reset
0
0
1
1
1
0
0
1
0
0
1
0
0
1
1
1
1
0
0
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
1
0
0
1
0
1
1
0
0
0
1
0
0
1
0
1
0
1
1
Register 0
Register 1
Register 2
Register 3
Register 4
Register 5
Register 6
Register 7
Register 9
Register 10
Register 11
Register 12
Register 13
Register 14
Register 15
Select Shift Right Mode
Register 8
Null Code
Select Shift Left Mode
Null Code
Figure 15. Write Register Bit Functions
0
*
*
CMOS SCC Serial Communications Controller
Write Register 3
Write Register 1
Write Register 2
D7 D6 D5 D4 D3 D2 D1 D0
D7 D6 D5 D4 D3 D2 D1 D0
D7 D6 D5 D4 D3 D2 D1 D0
0
1
1
0
0
1
0
1
Rx 5 Bits/Character
Rx 7 Bits/Character
Rx 6 Bits/Character
Rx 8 Bits/Character
0
0
1
1
0
0
1
1
Rx Int on Special Condition Only
Rx Int Disable
Rx Int on First Character or Special Condition
Int on all Rx Characters or Special Condition
Sync Character Load Inhibit
Rx CRC Enable
Rx Enable
Address Search Mode (SDLC)
Enter Hunt Mode
Auto Enables
Parity is Special Condition
V0
Ext Int Enable
Tx Int Enable
WAIT/DMA Request Function
WAIT/DMA Request
V1
V2
V3
V4
V5
V6
V7
WAIT/DMA Request on
Receive /Transmit
Product Specification
Interrupt
Vector
Functional Description
29