HD64570 HITACHI [Hitachi Semiconductor], HD64570 Datasheet - Page 69

• Manufacturer Part Number: HD64570
• Description: Serial Communications Adaptor
• Manufacturer: HITACHI [Hitachi Semiconductor]

Table 2.8
Symbol
INT
INTA
Note: If no signal is input on this line in non-acknowledge mode, pull this line up to V
Table 2.9
There are two sets of serial I/O lines, for channels 0 and 1 respectively. The functions of both
channels are the same (table 2.9).
Symbol CP-84
TXD0,
TXD1
RXD0,
RXD1
TXC0,
TXC1
RXC0,
RXC1
72, 62
69, 59
71, 61
70, 60
CP-84
75
76
Interrupt Lines
Serial I/O (MSCI) Lines
Pin Number
Pin Number
FP-88
86, 76
83, 73
85, 75
84, 74
FP-88
2
3
Input/
Output
Output Transmit data for MSCI: outputs transmit data from the
Input
Input/
output
Input/
output
Description
MSCI.TXD1
Receive data for MSCI: inputs receive data to the
MSCI.RXD1
Transmit clock for MSCI: inputs or outputs the MSCI
transmit clock. It has three programmable modes:
Input:
Output:
Receive clock for MSCI: inputs or outputs the MSCI
receive clock. This line can also be used to input the
ADPLL operating clock. It has four programmable modes:
Input:
Output:
Input/
Output
Input/
output
(Open
drain)
Input
Description
Interrupt request: used to request an interrupt.
The SCA drives INT active low when it has an
interrupt request.
Note: Be sure to pull this line up to V
Interrupt acknowledge: Used to acknowledge
an interrupt. The SCA recognizes an interrupt
acknowledge cycle when INTA goes active low.
External transmit clock
Transmit clock from the onchip baud rate
generator
Receive clock
(used as the transmit clock)
External receive clock
ADPLL operating clock
Receive clock extracted by the ADPLL (when
the on-chip baud rate generator is used as the
ADPLL operating clock)
Receive clock from the on-chip baud rate
generator
Rev. 0, 07/98, page 53 of 453
CC
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CC
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