R6684-17 Pin Descriptions (Mdp) - Acer AcerNote 970 Service Manual

Pin Descriptions
Table 2-9

R6684-17 Pin Descriptions (MDP)

Pin Name Pin Type
XTLI I
XTLO O
-RESET IA
VDD1-VDD3 PWR
+5VA PWR
DGND1 - GND
DGND5
AGND1 - GND
AGND2
VC DI
VREF DI
MCU Interface
D0-D8 IA/OB
RS0-RS4 IA
-READ IA
-WRITE IA
-CS IA
IRQ OA
MODEU Sterconnect
-POR Dl
DSP_RESET Dl
-RES Dl
DSP_IRQ Dl
-IRQ Dl
Pin No.
12 Crystal In and Crystal Out. Connect to an external 40.32
13 MHz crystal circuit or square wave generator/sine wave
oscillator circuit.
59 Reset. -RESET low holds the MDP in the reset state. -
RESET going high releases the modem from the reset state
and initiates normal operation using power turn-on (default)
values. -RESET must be held low for at least 3 us. The
modem is ready to use 400 ms after the low-to-high transition
of -RESET
11,36.41 +5V Digital Supply Voltage. Connect to +5V.
21 +5V Analog Supply Voltage. Connect to VCC through a
decoupling circuit
10, 19, 40, Digital Ground. Connect to digital ground.
43, 55
22, 30 Analog Ground. Connect to analog ground.
24 Centerpoint Voltage. Connect to analog ground through 10
pF (polarized, + terminal to VC) and 0.1 pF (ceramic) in
parallel.
25 Voltage Reference. Connect to VC through 10 pF
(polarized, + terminal to VREF) and 0.1 pF (ceramic) in
parallel.
14, 9, 15, Data Lines. Connect to the MCU external bus D0-D7 lines,
16, 68, 17, respectively.
67, 18
20, 66:63 Register Select Lines. Connect to the MCU external bus
A0-A4 lines, respectively.
60 Read Enable. Connect to MCU external bus -READ line
61 Write Enable. Connect to MCU external bus -WRITE line
62 Chip Select. Connect to -DPSEL from the MDP/DTP chip
select decode logic.
8 Interrupt Request. Connect to MCU DPIRQ
32 Power-On-Reset. Connect to -RESET.
2 DSP Reset. Connect to-RES.
39 Reset. Connect to DSP RESET.
4 DSP Interrupt Request. Connect to -IRQ
38 Interrupt Request Connect. to DSP_IRQ
Descriptions