Справочник Пользователя для IBM MiEM78P468L

EM78P468N/EM78P468L

8-Bit Microcontroller

Product Specification (V1.5) 02.15.2007

• 37

(This specification is subject to change without further notice)

6.9.4 RD/SBPCR (System, Booster and PLL Control Registers)

Bit 7

Bit 6

Bit 5

Bit 4

Bit 3

Bit 2

Bit 1

Bit 0

−

CLK2 CLK1 CLK0 IDLE BF1 BF0 CPUS

Bit 2 ~ 1 (BF1 ~ 0):

LCD booster frequency select bits

BF1

BF0

Booster Frequency

0 0 Fs

0 1

Fs/4

1 0

Fs/8

1 1

Fs/16

The initial setting flowchart for LCD function

IC RESET occur

*Set Port 7 snd Port 8 for general I/O or LCD segment (IOC50)
*it must be set to output port w hen the pin of port 7 and the pin of port 8 for LCD
segemnt (IOC70 and IOC80)

Set LCD Type, duty, bias, LCD frame frequency (R9)

Set LCD Booster Frequency (RD)

Clear all LCD RAM (RA and RB)

Enable LCD function (R9)

Use LCD address and LCD data buffer to implment user's applications. (RA and RB)

END

Fig.6-14 The Initial Setting Flowchart for LCD Function