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HE84G770B Datasheet(PDF) 6 Page - King blillion Electronics Co.,Ltd. |
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HE84G770B Datasheet(HTML) 6 Page - King blillion Electronics Co.,Ltd. |
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6 / 61 page  King Billion Electronics Co., Ltd 駿 億 電 子 股 份 有 限 公 司 HE84G770 HE80004H SERIES October 31, 2003 6 Version:V1.1 This specification is subject to change without notice. Please contact sales person for the latest version before use. Pin Name I/O Description COM drivers or SEG drivers can be selected by mask option MO_COM[1..0]. Please refer to LCD driver configuration for details. SEG[79..72]/ D[7..0] O LCD segment SEG[79..72] outputs share pads with data bus D[7..0] of external memory. SEG[71..48]/ A[23..0] O LCD segment SEG[71..48] outputs share pads with address bus A[23..0] of external memory. OE/SEG[47] O Output Enable control of external memory shares pad with SEG[47]. The function of the pin is selected by mask option MO_ EXMEM. When used as Output Enable control pin, this pin control the tri-state buffer of external memory data bus. WE/SEG[46] O Write Enable 0 of external memory shares pad with SEG[46]. The function of the pin is selected by mask option MO_ EXMEM. When used as Write Enable control pin, this pin controls Write Enable input of the external memory device. CS0/SEG[45] O Chip Enable 0 of external memory shares pad with SEG[45]. The function of the pin is selected by mask option MO_ EXMEM. When used as Chip Enable control pin, this pin select or de-select the external memory device based on the address been accessed. CS1/SEG[44] O Chip Enable 1 of external memory shares pad with SEG[44]. The function of the pin is selected by mask option MO_ EXMEM. When used as Chip Enable control pin, this pin select or de-select the external memory device based on the address been accessed. CS2 O Chip Enable 2 of external memory. This pin select or de-select the external memory device based on the address been accessed. CS3 O Chip Enable 3 of external memory. This pin select or de-select the external memory device based on the address been accessed. SGKY[43..24] O LCD segments share pads with key scan out SCNO[19..0]. The key scan function of these pins can be disabled by mask option clearing MO_LCDKEY to ‘0’, then SGKY[43..24] function as LCD segment driver only. Setting MO_LCDKEY to ‘1’ will turn on the key scan function. PRT14[7..0]/ SEG[23..16] B/ O 8 bits bi-directional I/O port 14 are shared with LCD segment pads SEG[23..16]. The function of the pad can be selected individually by mask options MO_LIO14[7..0]. (‘1’ for LCD and ‘0’ for I/O). The output type of I/O pad can also be selected by mask option MO_14PP[7..0] (1 for push-pull and ‘0’ for open-drain). As the output structure of I/O pad does not contain tri-state buffer. When using the I/O as input, “1” must be outputted before reading. PRT15[7..0]/ SEG[15..8] B/ O 8 bits bi-directional I/O port 15 are shared with LCD segment pads SEG[15..8]. The function of the pad can be selected individually by mask options MO_LIO15[7..0]. (‘1’ for LCD and ‘0’ for I/O). The output type of I/O pad can also be selected by mask option MO_15PP[7..0] (1 for push-pull and ‘0’ for open-drain). As the output structure of I/O pad does not contain tri-state buffer. When using the I/O as input, “1” must be outputted before reading. PRT17[7..0]/ SEG[7..0] B/ O 8 bits bi-directional I/O port 17 are shared with LCD segment pads SEG[7..0]. The function of the pad can be selected individually by mask options MO_LIO17[7..0]. (‘1’ for LCD and ‘0’ for I/O). The output type of I/O pad can also be selected by mask option MO_17PP[7..0] (1 for push-pull and ‘0’ for open-drain). As the output structure of I/O pad does not contain tri-state buffer. When using the I/O as input, “1” must be outputted before reading. |
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