參數(shù)資料
型號(hào)： MAX6957AGL
廠商： MAXIM INTEGRATED PRODUCTS INC
元件分類： 顯示驅(qū)動(dòng)器
英文描述： 4-Wire-Interfaced, 2.5V to 5.5V, 20-Port and 28-Port LED Display Driver and I/O Expander
中文描述： LED DISPLAY DRIVER, QCC40
封裝： QFN-40
文件頁(yè)數(shù)： 6/23頁(yè)
文件大小： 333K
代理商： MAX6957AGL
M
ond driver. The first driver ignores the last 4 bits and
the second driver ignores the first 4 bits.
Two addressing methods are available. Any single port
(bit) can be written (set/cleared) at once; or, any
sequence of eight ports can be written (set/cleared) in
any combination at once. There are no boundaries; it is
equally acceptable to write P0 through P7, P1 through
P8, or P31 through P38 (P32 through P38 are nonexis-
tent, so the instructions to these bits are ignored).
Using 8-bit control, a seven-segment digit with a deci-
mal point can be updated in a single byte-write, a 14-
segment digit with DP can be updated in two
byte-writes, and 16-segment digits with DP can be
updated in two byte-writes plus a bit write. Also, dis-
crete LEDs and GPIO port bits can be lit and controlled
individually without affecting other ports.
Shutdown
When the MAX6957 is in shutdown mode, all ports are
forced to inputs, and the pullup current sources are
turned off. Data in the port and control registers remain
unaltered so port configuration and output levels are
restored when the MAX6957 is taken out of shutdown.
The display driver can still be programmed while in
shutdown mode. For minimum supply current in shut-
down mode, logic inputs should be at GND or V+
potential. Shutdown mode is exited by setting the S bit
in the configuration register (Table 6). Shutdown mode
is temporarily overridden by the display test function.
4-Wire-Interfaced, 2.5V to 5.5V, 20-Port and
28-Port LED Display Driver and I/O Expander
6
_______________________________________________________________________________________
Table 1. Port Configuration Map
REGISTER DATA
D4
P6
P10
P14
P18
P22
P26
P30
REGISTER
ADDRESS
CODE (HEX)
D7
D6
D5
D3
D2
D1
D0
Port Configuration for P7, P6, P5, P4
Port Configuration for P11, P10, P9, P8
Port Configuration for P15, P14, P13, P12
Port Configuration for P19, P18, P17, P16
Port Configuration for P23, P22, P21, P20
Port Configuration for P27, P26, P25, P24
Port Configuration for P31, P30, P29, P28
0x09
0x0A
0x0B
0x0C
0x0D
0x0E
0x0F
P7
P11
P15
P19
P23
P27
P31
P5
P9
P13
P17
P21
P25
P29
P4
P8
P12
P16
P20
P24
P28
Table 2. Port Configuration Matrix
Note:
The logic is inverted between the two output modes; a high makes the output go low in LED segment driver mode (0x00) to
turn that segment on; in GPIO output mode (0x01), a high makes the output go high.
PORT
CONFIGURATION
BIT PAIR
MODE
FUNCTION
PORT
REGISTER
PIN BEHAVIOR
ADDRESS
CODE (HEX)
UPPER
LOWER
Written Low
High impedance
Output
LED Segment Driver
Written High
Open-drain current sink, with sink
current (up to 24mA) determined
by the appropriate current register
0x09 to 0x0F
0
0
Written Low
Written High
Active-low logic output
Active-high logic output
Output
GPIO Output
0x09 to 0x0F
0
1
Input
GPIO Input
Without Pullup
GPIO Input with Pullup
Reading Port
Schmitt logic input
0x09 to 0x0F
1
0
Input
Reading Port
Schmitt logic input with pullup
0x09 to 0x0F
1
1
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MAX6957AGL+ 功能描述:LED顯示驅(qū)動(dòng)器 2.5-5.5V 20/28Port LED Display Driver RoHS:否 制造商:Micrel 數(shù)位數(shù)量:5 片段數(shù)量: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:PLCC-44 工作電源電壓:4.75 V to 11 V 最大電源電流:10 mA 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝:Tube
MAX6957ANI 功能描述:LED顯示驅(qū)動(dòng)器 2.5-5.5V 20/28Port LED Display Driver RoHS:否 制造商:Micrel 數(shù)位數(shù)量:5 片段數(shù)量: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:PLCC-44 工作電源電壓:4.75 V to 11 V 最大電源電流:10 mA 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝:Tube
MAX6957ANI+ 功能描述:LED顯示驅(qū)動(dòng)器 2.5-5.5V 20/28Port LED Display Driver RoHS:否 制造商:Micrel 數(shù)位數(shù)量:5 片段數(shù)量: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:PLCC-44 工作電源電壓:4.75 V to 11 V 最大電源電流:10 mA 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝:Tube
MAX6957APL 制造商:Rochester Electronics LLC 功能描述: 制造商:Maxim Integrated Products 功能描述:
MAX6957ATL 功能描述:LED顯示驅(qū)動(dòng)器 RoHS:否 制造商:Micrel 數(shù)位數(shù)量:5 片段數(shù)量: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:PLCC-44 工作電源電壓:4.75 V to 11 V 最大電源電流:10 mA 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝:Tube
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