Motorola Internal Use
12
V2288 – Circuit Description
generates a 32.768MHz clock. This clock is output from Whitecap
Pin C7
and fed
directly to Whitecap
Pin P4
. The clock is always monitored by Whitecap and should
it fail, the unit will no longer go into deep sleep mode.
Logic: Keypad Operation
1)
The keypad works as a matrix supported V2. The signals inform the Whitecap upon a
key press by dropping the signal ‘low’. Below is the Key Matrix.
KBR0
KBR1
KBR2
KBR3
KBR4
KBC0
KBC1
KBC2
KBC3
KBC4
GND
KBR0
X
8
7
X
X
#
0
6
5
X
X
KBR1
8
X
1
X
X
9
SCROLL
UP
3
2
X
X
KBR2
7
1
X
X
X
*
4
BOX
CLEAR
X
X
KBR3
X
X
X
X
X
X
X
X
X
X
VOL
DOWN
KBR4
X
X
X
X
X
X
X
X
X
X
FM
RADIO
KBC0
#
9
*
X
X
X
X
SHIFT
SCROLL
DOWN
X
X
KBC1
0
SCROLL
UP
4
X
X
X
X
X
MENU
X
X
KBC2
6
3
BOX
X
X
SHIFT
X
X
OK
X
X
KBC3
5
2
CLEAR
X
X
SCROLL
DOWN
MENU
OK
X
X
X
KBC4
X
X
X
X
X
X
X
X
X
X
VOL UP
GND
X
X
X
VOL
DOWN
FM
RADIO
X
X
X
X
VOL UP
X
FM Radio: FM IC
1)
The FM IC
is new to any Motorola product and is incorporated into the V2288
Modulus II (R). It is controlled by the FM data bus, consisting of:
•
RW_AM_FM
:
WhiteCap output
Pin M2
. When low, WhiteCap
signal
DATA_AM_FM
(Whitecap
Pin N1
) is configured as an input to read data from the
FM IC. When high,
DATA_AM_FM
is configured as an output. The Whitecap shall
then send appropriate data to the FM IC.
•
CLK_AM_FM
:
Whitecap output,
Pin D2
. This has two functions. 1
st
: To clock the
SPI bus data (100KHz). 2
nd
: Tells the
MO_ST
output of the
FM IC U1001
Pin 26
to
indicate the mono/stereo or the tuned / un-tuned status.
•
DATA_AM_FM:
WhiteCap data in/output.
Refer to FM IC Block Diagram
Basic FM IC Operation:
Receiver function
