Zilog Z16C30 User Manual
Page 182

8-27
Z16C30 USC
®
U
SER
'
S
M
ANUAL
Z
ILOG
UM97USC0100
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
15
Starting value for Receive Character Counter
Receive Count Limit Register (RCLR)
Register Address 0 b 10101
Bit(s)
Field/Bit
Name
Conditions
/Context
Description
RW
Status
Ref Chapter: Section
RCLR15-0
Starting value for RCC: 0=disable RCC;
FFFF=enable RCC, no set max frame/message
length; else maximum allowed length
RW
5: DMA Support Features:
The Character Counters
Bit(s)
Field/Bit
Name
Conditions
/Context
Description
RW
Status
Ref Chapter: Section
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
15
Received character: read only using 16-bit operation
Receive Data Register (RDR)
Register Address 0 b 1x000 or 1 b xxxxx
The "other" received character in a 16-bit read
(may be the oldest or 2nd-oldest per "Select
D15-8 First" or "Select D7-0 First" commands in
RTCmd [CCAR15-11])
RO
5: The Data Registers and
the FIFOs
Received character: 8- or 16-bit read
RDR15-8
16-bit bus
Received character
RDR7-0
RW = Read/Write, RO = Read Only, WO = Write Only – for other codes see p. 8-10.
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