DM560P
V.90 Integrated Data/Fax/Voice/Speakerphone Modem Device Set
Preliminary
7
Version: DM560P-DS-P07
August 11, 2000
DM6583 Pin Description (continued)
Pin No.
Pin Name
I/O
Description
43
T1
I
Controller Counter 1 Input
44
/RI
I
Ring Signal Input
45
/DTR
I
DTR Input Pin (P1.1)
46
/OH
O
Hook Relay Control (P1.2)
47
/VOICE
O
Voice Relay Control. Modem Control Output (memory map is bit
3 of DAA)
48-50
EEPROM 1-3
I/O
EEPROM Control Pins (P1.4-P1.6)
53
RXD
I
Controller Serial Port Data Input
54
TXD
O
Controller Serial Port Data Output
55
ALE/P
O
Controller Address Latch Enable:
Output pulse for latching the low byte of the address during
accesses to the external memory.
56
/PSEN
O
Controller Program Store Enable:
This output goes low during a fetch from external program memory.
57
/WR
O
Controller External Data Memory Write Control
58
/RD
O
Controller External Data Memory Read Control
60 - 67
CA15 - CA8
O
Controller Address Bus
69 - 76
CA7 - CA0
O
Controller Address Bus
77 - 84
D7 - D0
I/O
Controller Data Bus
86
TXRCLK
I
Transmitter Baud Rate Clock Input (Controller INT 0)
87
RXRCLK
I
Receiver Baud Rate Clock Input (Controller INT 1)
88
/POR
O
DSP Reset Output
89, 90
VOICE Se1 1
VOICE Se1 2
O
Modem Control Output (Memory map is bit 1-2 of DAA at memory
address D000H)
91 - 94
A12 - A15
I
System Address:
These signals are connected to the bus of the PC I/O. They are
used to select the DM6583 I/O ports.
95
/PNPEN
I
PnP Mode Enable:
This pin selects PnP mode. When connected to ground, the
DM6583 will enter PnP mode when it receives the PnP initiation key
sequence. When disconnected, an internal pull up will disable the
Plug and Play function.
97
/TUCS
O
TX DSP Register Select Output:
Memory address mapping of the controller is F000H.
98
PS1
O
Modem Control Port Select Output:
Memory address mapping of the controller is D800H.
99
EXT/INTB
I
Select Pin: Used to select internal or external operation.
0: internal modem
1: external modem
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