CDC3205G-C Micronas, CDC3205G-C Datasheet - Page 201
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CDC3205G-C
Manufacturer Part Number
CDC3205G-C
Description
Automotive Controller Family The Device is a Microcontroller For Use in Automotive Applications.the On-chip Cpu is an Arm Processor ARM7TDMI with 32-bit Data And Address Bus, Which Supports Thumb format Instructions.
Manufacturer
Micronas
Datasheet
1.CDC3205G-C.pdf
(260 pages)
- Current page: 201 of 260
- Download datasheet (3Mb)
PRELIMINARY DATA SHEET
30. Audio Module (AM)
The Audio Module AM provides a gong output signal that
may be used to drive a speaker circuit.
The output signal is a square wave signal with selectable
gong frequency.
The gong signal amplitude is defined by the pulse width of a
PWM signal. An internal accumulator is selectable to auto-
matically decrease this pulse width and thus the gong ampli-
tude following an exponential function.
AM Clock
Fig. 30–1:
Micronas
HW Option AC
Write AMPRE
CLK
Set Prescaler-Register
8-Bit Counter
Block diagram of the audio module
Data Bus
Clear Counter
13
8
AM Trigger
13
+
AMA
Adder
&
&
1
13
F
Write AMF
/
Amplitude - Latch (13 Bit)
13
32
AMClock
13
F
PWM
CLK
COMP Amplitude=0 ?
-
June 12, 2003; 6251-579-1PD
Clear Counter
Set Frequency-Register
’0x1F’
7-Bit Counter
LSBs
13
8 Bit - PWM
Data Bus
5
MSB
Data Bus
7
8
8
AMAS
Features
– Programmable gong frequency
– Programmable gong duration
– Programmable initial amplitude
– Gong can be stopped and retriggered
– Generation of an exponentially decreasing gong
1
amplitude function without CPU interaction
8
/
2n
Write AMDEC
F
Gong
VDD
CLK
Clear Counter
Set Decrement-Register
S
R
AMMCA
5-Bit Counter
Q
0
Data Bus
AMA
Read AMAS
Write AMAS
(Start/Stop gong sound)
CDC 32xxG-C
3
&
1
/(
2
n
)
Data Bus
(Bit 7)
U 1.3
AM-PWM
U 1.4
AM-OUT
F
Decrement
199
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