BU91501KV-M Datasheet, PDF (2/34 Pages) Rohm – Multi- function LCD Segment Drivers

BU91501KV-M
Block Diagram / Pin Configuration / Pin Description
Datasheet
VLCD
LCD VOLTAGE
GENERATOR
+-
COMMON
DRIVER
+-
OSC
DO
SD
SCL
CSB
VDD
CLOCK
GENERATOR
3-SPI
INTERFACE
P.O.R
SEGMENT DRIVER & LATCH
SHIFT REGISTER
CONTROL
REGISTER
KEY BUFFER
KEY SCAN
49
KS5/S466
KS6/SS447
KI1/SS4488
KI2/SS4499
KI3/S5500
KI4/S511
KI5/S5522
OSC
RESB
TESDTO
CSB
SCL
SD
VLCD
VDD
VSS
64
32
S32
S31
S30
S29
S28
S27
S26
S25
S24
S23
S22
S21
S20
S19
S18
S17
17
Figure 2. Block Diagram
Figure 3. Pin Configuration (TOP VIEW)
Terminal
Terminal
No.
I/O
Handling When
Unused
Functions
CSB
59
I
VDD
Chip select : “L” active
SCL
60
I
VSS
Serial data transfer clock
SD
61
I
VSS
Input serial data
VDD
63
-
-
Power Supply for the logic
OSC
DO
RESB
VSS
56
I/O
OPEN/VSS
External Clock Input:
Fix to low or open when the internal clock mode setting.
58
O
OPEN
Output data
57
I
VDD
Reset Input:
RESB=“L” : Display is disabled.
RESB=“H” : Display is controllable.
However, serial data can not be transferred when RESB is “L”.
64
-
-
Power supply pin. Must be connected to ground.
VLCD
62
-
-
Power Supply for the LCD driver
COM1~COM3 41 to 43 O
OPEN
COMMON output for LCD driver
COM4/S41
S1/P1~S4/P4
S5~S40
44
O
1 to 4 O
5 to 40 O
KS1/S42~KS6/S47 45 to 50 O
KI1/S48~KI5/S52 51 to 55 I/O
OPEN
OPEN
OPEN
OPEN
OPEN
COMMON / SEGMENT output for LCD driver.
Assigned as SEGMENT output in 1/3Duty mode.
SEGMENT output for LCD driving / General Purpose Output
S1/P1～S4/P4 pins can also be used as General Purpose
Outputs when set up by the control data.
SEGMENT output for LCD driver
Key scan outputs
Although normal key scan timing lines require diodes to be
inserted in the timing lines to prevent shorts, since these
outputs are unbalanced CMOS transistor outputs, these
outputs will not be damaged by shorting when these outputs
are used to form a key matrix.
The KS1/S42 to KS6/S47 pins can be used as segment
outputs when specified by the control data.
Key scan inputs
These pins have built-in pull-down resistors.
The KI1/S48 to KI5/S52 pins can be used as segment outputs
when specified by the control data.
Table 1. Pin Description
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TSZ02201-0P4P0D301120-1-2
8.July.2015 Rev.001