ST7533 datasheet(49/60 Pages) SITRONIX

49 / 60 page

ST7533

Ver 1.0

49/60

2003/07/21

• The Relationship Between Oscillator Frequency fOSC, Display Clock Frequency fCL and the Liquid Crystal Frame

Rate Frequency fFR

Table 23

Item

fCL

fFR

Used internal oscillator circuit

fOSC / 8

fOSC / (8*33)

1/33 DUTY

Used external display clock

External input (fCL)

fCL / 264

Used internal oscillator circuit

fOSC / 16

fOSC / (16*17)

1/17 DUTY

Used external display clock

External input (fCL)

fCL / 272

(fFR is the liquid crystal alternating current period, and not the FR signal period.)

References for items market with *

*1 While a broad range of operating voltages is guaranteed, performance cannot be guaranteed if there are sudden

fluctuations to the voltage while the MPU is being accessed.

*2 The operating voltage range for the VDD system and the V5 system is. This applies when the external power supply is

being used.

*3 The A0, D0 to D5, D6 (SCL), D7 (SI), RD (E), /WR (R/W), /CS1, CS2, CLS, CL, FR, M/S and

C86, P/S, /DOF, /RES, IRS, and /HPM terminals.

*4 The D0 to D7, FR, FRS, /DOF, and CL terminals.

*5 The A0, /RD (E), /WR (R/W), /CS1, CS2, CLS, M/S, C86, P/S, /RES, IRS, and /HPM terminals.

*6 Applies when the D0 to D5, D6 (SCL), D7 (SI), CL, FR, and /DOF terminals are in a high impedance state.

*7 These are the resistance values for when a 0.1 V voltage is applied between the output terminal SEGn or COMn and the

various power supply terminals (V1, V2, V3, and V4). These are specified for the operating voltage (3) range.

RON = 0.1 V /ΔI (Where ΔI is the current that flows when 0.1 V is applied while the power supply is ON.)

*8 See Table 23 for the relationship between the oscillator frequency and the frame rate frequency.

*9 The V5 voltage regulator circuit regulates within the operating voltage range of the voltage follower.

*10 This is the internal voltage reference supply for the V5 voltage regulator circuit. In the ST7533 , the temperature range

approximately –0.15%/°C.

*11, 12 It indicates the current consumed on ICs alone when the internal oscillator circuit and display are turned on.

The ST7533 is 1/5 biased. Does not include the current due to the LCD panel capacity and wiring capacity.

Applicable only when there is no access from the MPU.

*12 It is the value on a ST7533 having the VREG temperature gradient is –0.15%/°C when the V5 voltage regulator

internal resistor is used.

ST7533 Datasheet(PDF) 49 Page - Sitronix Technology Co., Ltd.

ST7533 Datasheet(HTML) 49 Page - Sitronix Technology Co., Ltd.

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