Atmel manual STK502 LCD Bit Mappings, Number Two, Number Three, Number Four, Number Five

Technical Specifications

4.1STK502 LCD Bit Mappings

The LCD Data Registers (LCDDRx) in the ATmega169 are organized in groups accord- ing to the use of Backplane Control Lines (also known as Common Lines). The LCD on the STK502 uses all four Common Lines and all 25 segments, in total 4 x 25 = 100 seg- ments. As can be seen in the LCD data sheet (Figure 4-1)describing the internal connection of pins, Common Lines and segments, the alphanumeric digits are referred to with a number according to where they are located on the LCD. Listed below is a description of the STK502 bit mappings according to this.

4.1.1Alphanumeric Digit The bit mappings for the alphanumeric digit number two are listed below.

Number Two

Table 4-1.Bit Mappings for LCD Alphanumeric Digit Number Two

Register Name	Bit7	Bit6	Bit5	Bit4	Bit3	Bit2	Bit1	Bit0
LCDDR0					2-K	1	S1	2-A
LCDDR5					2-J	2-F	2-H	2-B
LCDDR10					2-L	2-E	2-G	2-C
LCDDR15					2-M	2-P	2-N	2-D

4.1.2Alphanumeric Digit The bit mappings for the alphanumeric digit number three are listed below.

Number Three

Table 4-2.Bit Mappings for LCD Alphanumeric Digit Number Three

Register Name	Bit7	Bit6	Bit5	Bit4	Bit3	Bit2	Bit1	Bit0
LCDDR0	3-K	2	S2	3-A
LCDDR5	3-J	3-F	3-H	3-B
LCDDR10	3-L	3-E	3-G	3-C
LCDDR15	3-M	3-P	3-N	3-D

4.1.3Alphanumeric Digit The bit mappings for the alphanumeric digit number four are listed below.

Number Four

Table 4-3.Bit Mappings for LCD Alphanumeric Digit Number Four

Register Name	Bit7	Bit6	Bit5	Bit4	Bit3	Bit2	Bit1	Bit0
LCDDR1					4-K	S3	4	4-A
LCDDR6					4-J	4-F	4-H	4-B
LCDDR11					4-L	4-E	4-G	4-C
LCDDR16					4-M	4-P	4-N	4-D

4.1.4Alphanumeric Digit The bit mappings for the alphanumeric digit number five are listed below.

Number Five

Table 4-4.Bit Mappings for LCD Alphanumeric Digit Numer Five

Register Name	Bit7	Bit6	Bit5	Bit4	Bit3	Bit2	Bit1	Bit0
LCDDR1	5-K	S4	5	5-A
LCDDR6	5-J	5-F	5-H	5-B
LCDDR11	5-L	5-E	5-G	5-C
LCDDR16	5-M	5-P	5-N	5-D

STK502 User Guide

4-3

2528A–AVR–11/02