Table of Contents
Advertisement
Hardware Description
3.9
DISPLAY INTERFACE
This section describes the c18 display interface and its requirements.
3.9.1
Serial LCD
The c18 has an interface for connecting a serial 96x64 LCD. The interface is available only on c18 models using the full-featured
70-pin interface connector. Table 13 describes the pin attributes for the LCD.
Pin #
56
58
54
60
25
3.9.2
Backlights
3.9.2.1
KEYB_DRV
The KEYB_DRV output is intended to be a driver for backlight LEDs in handset-like applications. KEYB_DRV is an open
drain output used to sink the current. Therefore, the backlight LEDs' anode should be tied to VCC and the cathode to the c18
KEYB_DRV pin. By default, the c18 enables this driver on power-up.
This feature is available only on c18 models using a 70-pin interface connector.
An external driver should be implemented if higher drive currents are required.
Note
34
Pin Name
Data for serial LCD. Data comes from an 8-bit parallel-to-serial
LCD_DATA
converter.
LCD_CLK
LCD clock rate: 9.6 MHz.
LCD_CS_N
Chip-select signal (active low).
Register-select signal. When RS=1, Data is sent on the
LCD_RS
LCD_DATA line. When RS=0, Command is sent on the
LCD_DATA line.
RESOUT_N
Reset out from the modem MSM5100 (active low).
Table 13. LCD Pins
Description
98-08901C63-A
Advertisement
Table of Contents
