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Pin Descriptions
Table 2-10
R6693-14 Pin Descriptions
Pin Name
Pin Type
XTLI, XTLO
R
-RESET
ID
-POR
IA
VDD1-VDD3
PWR
AVDD, VAA1,
PWR
VAA2
DGND1-DGND5
GND
DGNDA[1:3]
GND
AGND[1:2]
D0-D7
IA/OB
RS0-RS4
IA
-CS
IA
-READ
IA
-WRITE
IA
LINEOUT
O(DF)
LINEIN
I(DA)
AMODE0 (SP2),
OA
AMODE1 (SP3)
-EN85
IA
Pin No.
73, 74
Crystal In and Crystal Out. Connect to an external 49.92
MHz fundamental or third overtone crystal circuit.
Reset. After application of +5V power, -RESET must be
held low for at bast 15 ms after the +5V power reaches
operating range. The DTP is ready to use 25 ms after the
low-to-high transition of -RESET. The reset sequence
initializes the DTP interface memory to default values.
Power-On-Reset. Connect to -RESET
6, 58, 77,
+5V Digital Supply Voltage. Connect to Vcc
25, 35,
+5V Analog Supply Voltage. Connect to VCC through
45,
decoupling circuit
16, 66,
Digital Ground. Connect to digital ground.
80, 81, 97
21, 30,
Analog Ground. Connect to analog ground.
42, 27, 37
14:7
Data Lines. Connect to the MCU external bus D0-D7 lines,
respectively.
5:1
Register Select Lines. Connect to the MCU external bus
A0-A4 lines respectively.
52
Chip Select. Connect to -SPSEL output from be MDP/DTP
chip select decode logic.
53
Read Enable. Connect to the MCU external bus -READ
line.
15
Write Enable. Connect to MCU external bus -WRITE line.
28
Line Out Analog Output. The LINEOUT is a single-ended
output to the telephone line through the hybrid circuit. The
output can drive a 300Ω load.
38
Line In Analog Input. The LINEIN is a single ended input
from the audio interface.
69, 65
Audio Mode Select. single-ended output to the audio
interface circuit, typically through a 74HC4052 analog
multiplexer /demultiplexer. The modes are:
AMODE
1:0]
Function
00
Microphone Record
01
Sound Chips
10
Speakerphone
11
Data/Fax/Voice/BA/
Record Conversation
94
Enable 85 Bus. Connect to GND
Descriptions
Receive Input
Transmit Output Via
to the MDP (Y)
to the DAA (X)
Microphone Input TXA from MDP
RXA from DAA
SCOUT from sound chips
RXA from DAA
LINEOUT from DTP
PLXA from DAA
TXA from MDP
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