upd70f3422gj-gae-qs-ax Renesas Electronics Corporation., upd70f3422gj-gae-qs-ax Datasheet - Page 810

• Manufacturer Part Number: upd70f3422gj-gae-qs-ax
• Description: 32-bit Single-chip Microcontroller
• Manufacturer: Renesas Electronics Corporation.

Chapter 22
810
SEG0 ...
Figure 22-1
SEG10
Table 22-1
Segment Driver
Data Memory
Data Selector
...
22.1.1 Description
Segment
Display
SEG20
SEG30
...
Internal Bus
...
The following figure shows the main components of the LCD Controller/Driver:
LCD Controller/Driver block diagram
The pattern that is to be displayed on the LCD panel has to be mapped to bit
data. The bit data is stored in the display control registers SEGREGk
(k = 0 to 39). The LCD Controller/Driver generates the corresponding output
signals for driving the LCD panel.
The update rate of the LC display is determined by the frame frequency. It can
be adjusted via the clock control register LCDC.
The external signals are listed in the following table.
LCD Controller/Driver external connections
Preliminary User’s Manual U17566EE1V2UM00
SEG39
Signal name
SEG[0:39]
COM[0:3]
COM0 COM1 COM2 COM3
Timing Controller
Common Driver
I/O
O
O
f
LCD1
LCD Frame Frequency Selection
SEG0 to SEG39
COM0 to COM3
f
LCD0
2
9
f
LCD0
2
Prescaler
Selector
8
Pins
Voltage Generator
f
LCD0
2
7
LCD Drive
f
LCD0
2
LCD Controller/Driver (LCD-C/D)
6
f
LCD0
LCD Clock Selection
Function
Segment signals
Common signals
SPCLK7 (125 KHz)
LCDCLK
SPCLK9 (31.25 KHz)