HM17CM256 datasheet(14/111 Pages) HYNIX

14 / 111 page

HM17CM256

- 14 -

s FUNCTION DESCRIPTION

(1) CPU interface

(1-1)

Selection of interface type

HM17CM256 receives data through 8 bit parallel I/O(D0~D7)

16 bit parallel I/O(D0~D15) or

divided into serial data input (SDA, SCL). Parallel or serial selection is decided by P/S pin setting.

Parallel or serial selection is possible as following table.

Reading out from internal register or RAM is not possible at serial interface mode.

TABLE

P/S

Type

SEL68

SDA

SCL

data

Parallel input

SEL68

D0~D7 (D0~D15)

Serial input

SDA

SCL

caution 1) “-” mark item : Fix to ”H” or ”L”

(1-2)

Parallel input

In the parallel interface mode selected by P/S port, parallel data is transferred from the

8bit/16bit MPU through data bus.

SEL68 port setting makes 80-series or 68-series interface

selection

TABLE

SEL68

CPU type

data

68 series CPU

R/W

D0~D7 (D0~D15)

80 series CPU

D0~D7 (D0~D15)

(1-3)

Data identification

Combinations of RS, RD, and WR signals identify contents of 8bit data bus.

TABLE

68 series

80 series

R/W

FUNCTION

Read out from internal register

Write in to internal register

Read display data

Write display data

(1-4)

Serial interface

2 types of serial interface (3 line type mode, 4 line type mode) are available by selecting

SMODE pin.

TABEL

SMODE

Serial interface mode

3 line type

4 line type

HM17CM256 Datasheet(PDF) 14 Page - Hynix Semiconductor

HM17CM256 Datasheet(HTML) 14 Page - Hynix Semiconductor

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 ...More

Datasheet Download

Link URL