z85230 ZiLOG Semiconductor, z85230 Datasheet - Page 114

• Manufacturer Part Number: z85230
• Description: Enhanced Serial Communications Controller
• Manufacturer: ZiLOG Semiconductor

digital phase-locked loop
DPLL counter Tx clock source
E
encoding, data
end of poll (EOP) character
enhancements
EOP
errata
ESCC
external synchronization
F
FIFO
functional description
G
general timing characteristics table, Z80230
general timing table, Z85230
PS005303-0907
system timing, Z80230 85
system timing, Z85230 97
transmit data path 8
TxIP latching 27
write cycle timing,Z85230 74
Z80230 pin assignments 3
Z80230 pin functions 2
Z85230 pin assignments 3
Z85230 pin functions 2
receive FIFO, 8 bytes 22
transmit FIFO, 4 bytes 22
Z80230 and Z85230 22
programming 32
read registers 53
write registers 32
anti-lock feature 31
enable/disable 30
read operation 30
write operation 31
18
98
20
8
4
5, 19
18
94
27
81
I
identification, device types
IE
input/output capabilities
INTACK
interface timing, Z80230
internal synchronization
interrupt acknowledge cycle timing
interrupts
IUS latch
IUS problem
L
latch
local loopback
12
Z80230 71
Z85230 74
external/status 13, 14
interrupt cknowledge (INTACK) 13
interrupt enable (IE) 12
interrupt on all receive characters or special
interrupt on first receive character or spe-
interrupt on special receive conditions only
interrupt pending (IP) 12, 13
interrupt under service (IUS) 12, 13
receive 13
receive character available 22
transmit 13
transmit buffer empty 22, 24
Tx underrun/EOM 28
description 98
solutions 99
ISU 28
RR0 27
TxIP 26
13
28
12
receive conditions 14
cial receive condition 14
14
21
9
4
Product Specification
70
24
Index
109