ST7637 datasheet(60/210 Pages) SITRONIX

60 / 210 page

ST7637

Ver 1.6

60/210

2009/03

Note3: When writing value to OTP, the voltage of VPP must be more than 7.5V (7.5V~7.75V); the current of

Ivpp must be more than 4 mA.

Note4: If the OTP is exposed to a high temperature for hours, data in the memory cell may probably be lost

before the data retention guarantee period. To retain data in the memory cell, keep the memory cell below

90℃. The data retention guarantee period is specified including the retention period.

7.11 Frquency Temperature Gradient Compensation Coefficient

ST7637 will auto-switch frame rate on different temperature such as Figure 7.11-1. TA,TB and TC are frame rate

switching temperatures which can be defined by customer with command TMPRNG(see section 9.1.70). FA, FB, FC

and FD are switched frame rate which also can be defined by customer with command FRMSEL (see section 9.1.65).

The frame rate range is from 37.5Hz to 170Hz.

When the temperature is in increasing state, frame rate changes to the higher step at TA/TB/TC+TH(

℃ When

the temperature is in decreasing state, frame rate changes to the lower step at TA/TB/TC. For example: TC=10℃

and TH=5

, FC switches to FD at 15

but FD switches to FC at 10

. Please take

℃

Figure 7.11-1 for reference.

Figure 7.11-1

ST7637 Datasheet(PDF) 60 Page - Sitronix Technology Co., Ltd.