NJU6535FH1 NJR, NJU6535FH1 Datasheet - Page 19

• Manufacturer Part Number: NJU6535FH1
• Description: LCD Drivers 1/3 1/4 LCD
• Manufacturer: NJR

Specifications of NJU6535FH1

• Operating Supply Voltage: 5.5 V
• Maximum Operating Temperature: + 70 C
• Package / Case: PQFP-H1
• Minimum Operating Temperature: 0 C
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

(7)
Ver.2004-04-16
(7-1) Initial status in reset
(7-2) The status of output port terminals in power on reset
(7-3) Power on reset operation
Internal
Power on reset circuit initializes
VDD
data
CE
initialize the system at low VDD less than power down detection voltage (2.5V typical).
the system of NJU6535 as reset. When the voltage falling time of power source is over than 1mS, the
system is also reset. This status of reset is released automatically at the falling signal of CE terminal after
completed serial data transmission ( Display data D1 to D126 and control data at 1/3 duty, Display data
D1 to D164 and control data at 1/4 duty).
operaiton as reset does not operate correctly.
1, Stop the oscillation circuit
2, Display Off (Available Serial data transmission)
3, Disable Key scan function
4, Filled “L” ” data in all of key data buffer
*1 This terminal operates as segment driver and outputs “L”.
*2 This terminal is not fixed the function in/after power on reset until PS0 and PS1 of control data are transmitted.
*3 This terminal consisted of Open-drain output type circuit requires external pull-up resister (1K ohm to 10k)
Power on reset circuit initializes the NJU6535 at Power ON and OFF. It generates reset signal to
When the voltage rising time of power source is over than 1mS, the generated signal of VDET initializes
When these voltage rising or falling time of power source are not over than 1ms, the Initialization
connect ting to external power source for CPU. I f key data read is executed in power on reset, the read data is
fixed as “H”.
t1
VDET
SEG
S
Output terminals
COM
0
SEG
/SEG
System reset time
SEG
1
/P
S
Display control
5
0
1
2
41
40
SO
Not fixed
to SEG
data send
S
to SEG
to COM
to S
,S
/COM
5
1
/SEG
4
4
39
4
3
/P
42
3
Fixed
Reset status
t2
L *1
L
L *1
L
L *1
X *2
H
H *3
VDET
VDD rising time
VDD falling time
t1>1[ms]
t2>1[ms]
NJU6535
- 19 -