DATA SHEET
RSC-164
From the Interactive Speech™ Line of Products
7
DIE BOND PAD, PLCC AND QFP PIN DRAWINGS
33
48
1
16
17
32
49
64
4
RSC-164
64-pin QFP
Name
PLCC Pin/
Die Pad
QFP Pin
Description
I/O
AGND
64
52
Analog Ground. For noise reasons, analog and digital grounds should
connect together only at the RSC-164.
-
A[15:0]
10-17, 20-27
1-8, 11-18
External Memory Address Bus
O
AIN0
63
51
Analog In, low gain. (range AGND to AVDD/2.)
I
AIN1
62
50
Analog In, hi gain (8X input amplitude of AIN0, same range)
I
AVDD
67
55
Analog Voltage. For noise reasons, keep this supply independent of
digital circuitry.
-
PWM0
65
53
Pulse Width Modulator Output0
O
DACOUT
60
48
Analog Output (unbuffered).
O
D[7:0]
2-9
57-64
External Data Bus
I/O
GND
1, 18, 33, 52
9, 22 41, 56
Digital Ground, CPU core (pins 1 and 33) and I/O (pins 18and 52)
-
PDN
57
NA
Power Down. Active high when powered down.
O
P1[7:0], P0[7:0]
35-42, 43-50
24-31, 32-39
General Purpose Port I/O. Pin P0.0 can act as an external interrupt
input. All I/O pins can act as “wake up” inputs.
I/O
-RDC
53
42
External Code Read Strobe
O
-RDD
55
44
External Data Read Strobe
O
-RESET
32
21
Reset
I
SH
61
49
Sample and Hold. Connect a 470 pF capacitor from here to AGND.
I
-TE1/PWM1
66
54
Test Mode or Pulse Width Modulator Output1 (multiplexed)
I or O
VDD
34, 68
23
Digital Supply Voltage (core)
-
VDDi
19, 51
10, 40
Digital Supply Voltage (I/O line)
-
-WRC
54
43
External Code Write Strobe
O
-WRD
56
45
External Data Write Strobe
O
-XMH
58
46
External Hi-memory enable (low active)
I
-XML
59
47
External Low-memory enable (low active)
I
XO1
30
19
Oscillator 1 output (high frequency)
O
XI1
31
20
Oscillator 1 input
I
XO2
29
NA
Oscillator 2 output (32768 Hz)
O
XI2
28
NA
Oscillator 2 input
I
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