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| 3. Pin functions |
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Pin | Pin name | I/O | Functional description | |||||
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1 | AN2 | I/O | Touch screen XL/UR input pin. | |||||
2 | AN3 | I/O | Touch screen XR/LL input pin. | |||||
3 | SEL1 | I | Transition select pin. | |||||
H = Auto transition*1 after reset. L = transition by command. | ||||||||
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4 |
| I | EEPROM DO input pin; At using no EEPROM, Vcc or GND is connected. | |||||
5 | VREF | I | A/D converter reference voltage input pin; Vcc is connected. | |||||
6 |
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| I | Reset input pin (active L). | |||
RST | ||||||||
7 | CNVSS | I | Operation mode control pin; Vss is connected. | |||||
8 |
| VCC | I | Power supply input pin; Vcc is connected. | ||||
9 |
| XIN | I | Clock input pin; When using external clock, clock is input to this pin. | ||||
10 | XOUT | O | Clock output pin; When using external clock, this pin is opened. | |||||
11 |
| VSS | I | Power supply input pin (GND); GND is connected. | ||||
12 |
| P30 | O | Opened*2. | ||||
13 | LED1 | O | LED output pin; ON = Lo, OFF = Hi. | |||||
14*3 | I/O | EEPROM DI signal output pin; When using EEPROM, EEPROM DI is connected. | ||||||
Whether or not EEPROM is used, connect with GND via resistance. | ||||||||
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| EEPROM SK signal output pin; When using EEPROM, EEPROM SK is connected. | ||
15*3 | I/O | Touch screen mode setting pin. | ||||||
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| Whether or not EEPROM is used, connect with Vcc or GND via resistance. | ||
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| EEPROM setting pin shared with EEPROM CS signal output pin. | ||
16*3 |
| I/O | EEPROM is set via resistance and Vcc or GND is connected. (L = Used, H = Not | |||||
used). | ||||||||
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| When using EEPROM, EEPROM CS is connected. | ||
17 |
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| O | Unused pin; Opened. | |||
18 | SYD/LL | O | Touch screen LL control pin. | |||||
19 | SYU/UL | O | Touch screen UL control pin. | |||||
20 | SXL/UR | O | Touch screen UR control pin. | |||||
21 | SXR/LR | O | Touch screen LR control pin. | |||||
22 | THO | O | Pen down detection pin. | |||||
23 |
| THI | I | In | ||||
24 | RxD_I | I | In | |||||
Only used serial mode, RxD is connected. | ||||||||
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25 | SEL0 | I | If power supply voltage is 4.0 to 5.5V, GND is connected. If power supply voltage is | |||||
3.3 to 4.0V, Vcc is connected. | ||||||||
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26 | RxD | I/O | Data receive pin. | |||||
27 |
| TxD | I/O | Data send pin. | ||||
28 | SW1 | I | SW1 input pin *4; H = ON = 1, L = OFF = 0. | |||||
29 | SW0 | I | SW0 input pin *4; H = ON = 1, L = OFF = 0. | |||||
30 | BEEP | O | BEEP output pin; Hi output; Output frequency =2.5kHz, Output time =50ms. | |||||
31 | AN0 | I | Touch screen YD/LL input pin. | |||||
32 | AN1 | I | Touch screen YU/Sense input pin. | |||||
Document No. | 5 | Version 1.2 ©2008 DMC Co., Ltd. |