Z16M1720ASG1868 Zilog, Z16M1720ASG1868 Datasheet - Page 278
Z16M1720ASG1868
Manufacturer Part Number
Z16M1720ASG1868
Description
IC PCMCIA INTERFACE 100-VQFP
Manufacturer
Zilog
Datasheet
1.Z0847006PSG.pdf
(330 pages)
Specifications of Z16M1720ASG1868
Applications
*
Interface
*
Voltage - Supply
*
Package / Case
100-LQFP
Mounting Type
Surface Mount
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
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Manufacturer
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Price
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Table 8. Contents of Write Registers 3, 4, and 5 in SDLC Modes
UM008101-0601
WR
3
WR
4
WR
5
< % 2 7 2 G T K R J G T C N U
7 U G T / C P W C N
Bit 7
00 = Rx 5 Bits Char
10 = Rx 6 Bits Char
01 = Rx 7 Bits Char
11 = Rx 8 Bits Char
0
DTR
Bit 6
0
00 = Tx 5 Bits (or less)
Char
10 = Tx 6 Bits Char
01 = Tx 7 Bits Char
11 = Tx 8 Bits Char
information field may be sent to the Z80 SIO using the Transmit Interrupt
mode. The Z80 SIO transmits the Frame Check sequence using the
Transmit Underrun feature.
When the transmitter is first enabled, it is already empty and cannot then
become empty. Therefore, no Transmit Buffer Empty interrupts can occur
until after the first data character is written.
Data Transfer Using WAIT/READY
When the Wait/Ready function is selected, WAIT communicates to the
CPU that the Z80 SIO is not ready to accept the data and that the CPU must
extend the I/O cycle. To a DMA controller, READY communicates that the
transmitter buffer is empty and that the Z80 SIO is ready to accept the next
character. If the data character is not loaded to the Z80 SIO by the time the
transmit shift register is empty, the Z80 SIO enters the Transmit Underrun
condition. Address, control, and information fields may be transferred to
Bit 5
Auto
Enables
1
Selects
SDLC
Mode
Bit 4
Enter Hunt
Mode (if
incoming
data not
needed)
0
Selects
SDLC
Mode
0
Bit 3
Rx CRC
Enable
0
Tx Enable 0
Bit 2
Address
Search
Mode
0
Selects
SDLC
CRC
Bit 1
0
0
RTS
Serial Input/Output
Bit 0
Rx
Enable
0
Tx CRC
Enable
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