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(2) Interconnection with external devices
A. RTC Block Interface
Countered by external crystal oscillator (MC-146, X101).
The X-tal oscillates 32.768 KHz.
B. LCD Module Interface
Controlled by LCD_CS, LCD_RES, ADD01, WR, DATA[0:15], DIM_CNTL, and LCD_ID.
LCD_CS
LCD_RES
ADD01
WR
DATA[0:15]
LCD_BL
LCD_ID
C. RF Interface
The AD6525 control RF parts through RF_EN, ANT_SW1/2, PA_EN, PA_BAND, RF_PWR_DWN,
S_EN, S_DATA, AND S_CLK.
GPO
Signal Name
4
9
11
16
17
18
RF_PWR_DWN
19
20
21
Table 3-3 LCD module interface
Description
LCD driver chip enable. LCD driver IC has own CS pin
This pin resets LCD module.
This pin determines whether the data to LCD module are
display data or control data. ADD1 can select 16 bit parallel
bus. ADD1 is also used to address flash memory.
Write control.
Parallel data lines. Color LCD driver chip uses the 16 bit data
interface.
Control signal for white LED(LCD backlight) driver IC.
Reserved for future use.
Table 3-4 RF interface
RF_EN
ANT_SW1
ANT_SW2
PA_EN
PA_BAND
S_EN
S_DATA
S_CLK
Description
RF Enable / Disable
Antenna Switch Band Select
Antenna Switch Band Select
PAM Enable / Disable
PAM Band Select
Power Down Input
Serial Enable Input
Serial Data Input
Serial Clock Input
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3. TECHNICAL BRIEF
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