HT1625 - Topwaydisplay.com

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HT1625 Pad Coordinates Unit: mil Pad No. X Y Pad No. X Y 1 90.18 98.56 45 90.57 84.53 2 90.18 91.93 46 90.57 77.90 3 90.18 85.30 47 89.80 68.13 4 90.18 75.95 48 89.80 61.50 5 89.42 57.76 49 89.80 49.51 6 89.42 45.77 50 89.80 42.88 7 90.18 39.14 51 89.80 30.90 8 90.18 32.51 52 89.80 24.27 9 90.18 25.03 53 89.80 12.28 10 90.18 15.94 54 89.80 5.65 11 90.18 5.82 55 89.80 6.33 12 90.18 3.61 56 89.80 12.96 13 90.18 10.24 57 89.80 24.95 14 90.18 16.87 58 89.80 31.58 15 90.18 23.50 59 89.80 43.56 16 90.18 30.13 60 89.80 50.19 17 90.18 36.76 61 89.80 62.18 18 90.18 43.39 62 89.80 68.81 19 90.18 92.22 63 89.80 80.79 20 83.17 99.53 64 89.80 87.42 21 76.54 99.53 65 89.38 98.22 22 69.91 99.53 66 77.39 98.22 23 63.28 99.53 67 70.76 98.22 24 56.65 99.53 68 58.78 98.22 25 50.02 99.53 69 52.15 98.22 26 43.39 99.53 70 40.16 98.22 27 36.76 99.53 71 32.09 99.32 28 30.13 99.53 72 25.46 99.32 29 23.50 99.53 73 18.83 99.32 30 16.87 99.53 74 12.20 99.32 31 10.24 99.53 75 5.57 99.32 32 3.61 99.53 76 1.06 99.32 33 3.02 99.53 77 7.69 99.32 34 9.65 99.53 78 14.32 99.32 35 16.28 99.53 79 20.95 99.32 36 22.91 99.53 80 27.58 99.32 37 29.54 98.60 81 34.21 99.32 38 41.52 98.60 82 40.84 99.32 39 48.15 98.60 83 47.47 99.32 40 60.14 98.60 84 54.10 99.32 41 66.77 98.60 85 60.73 99.32 42 78.75 98.60 86 67.36 99.32 43 90.57 97.79 87 73.99 99.32 44 90.57 91.16 Rev. 1.10 4 September 11, 2002
HT1625 Pad Description Pad No. Pad Name I/O Description 1 RD I READ clock input with pull-high resistor. Data in the RAM of the HT1625 are clocked out on the falling edge of the RD signal. The clocked out data will appear on the data line. The host controller can use the next rising edge to latch the clocked out data. 2 WR I WRITE clock input with pull-high resistor. Data on the DATA line are latched into the HT1625 on the rising edge of the WR signal. 3 DATA I/O Serial data input or output with pull-high resistor 4 VSS Negative power supply, ground 5 6 OSCI OSCO I O The OSCI and OSCO pads are connected to a 32.768kHz crystal in order to generate a system clock. If the system clock comes from an external clock source, the external clock source should be connected to the OSCI pad. But if an on-chip RC oscillator is selected instead, the OSCI and OSCO pads can be left open. 7 VDD Positive power supply 8 VLCD I LCD operating voltage input pad. 9 IRQ O Time base or Watchdog Timer overflow flag, NMOS open drain output 10, 11 BZ, BZ O 2kHz or 4kHz tone frequency output pair 12~14 T1~T3 I Not connected 15~22 COM0~COM7 O LCD common outputs 23~86 SEG0~SEG63 O LCD segment outputs 87 CS I Chip selection input with pull-high resistor. When the CS is logic high, the data and command read from or write to the HT1625 are disabled. The serial interface circuit is also reset. But if the CS is at logic low level and is input to the CS pad, the data and command transmission between the host controller and the HT1625 are all enabled. Absolute Maximum Ratings Supply Voltage .........................................0.3V to 5.5V Input Voltage.............................V SS 0.3V to V DD +0.3V Storage Temperature ............................50C to125C Operating Temperature...........................25C to75C Note: These are stress ratings only. Stresses exceeding the range specified under Absolute Maximum Ratings may cause substantial damage to the device. Functional operation of this device at other conditions beyond those listed in the specification is not implied and prolonged exposure to extreme conditions may affect device reliability. Rev. 1.10 5 September 11, 2002
Page 1 and 2: HT1625 RAM Mapping 648 LCD Controll
Page 3: HT1625 Pad Assignment 5 - / " ! 5 -
Page 7 and 8: HT1625 A.C. Characteristics Ta=25C
Page 9 and 10: HT1625 The following are the data m
Page 11 and 12: HT1625 Command mode (command code :
Page 13 and 14: HT1625 Name ID Command Code D/C Fun
Page 15: HT1625 Holtek Semiconductor Inc. (H

HT1625 - Topwaydisplay.com

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