MAX1366ECM Maxim Integrated, MAX1366ECM Datasheet - Page 26

• Manufacturer Part Number: MAX1366ECM
• Description: LED Display Drivers
• Manufacturer: Maxim Integrated

Microcontroller-Interface, 4.5-/3.5-Digit Panel
Meters with 4–20mA Output
LED segment-display register 1 is a 16-bit read/write
register. When the LED bit (in the control register) is set
to 1, the MAX1366/MAX1368 provide direct access to
individual LED segments. The bits in the LED segment-
display register determine if a segment is on or off.
Write a zero to turn on a segment and a 1 to turn off a
segment.
DP1: Segment DP driver bit of digit 1. The default value
turns on the LED segment.
E0: Segment E driver bit of digit 0. The default value
turns on the LED segment.
F0: Segment F driver bit of digit 0. The default value
turns on the LED segment.
D0: Segment D driver bit of digit 0. The default value
turns on the LED segment.
G0: Segment G driver bit of digit 0. The default value
turns on the LED segment.
A0: Segment A driver bit of digit 0. The default value
turns on the LED segment.
Default values:
The underrange data register is 16-bit read/write regis-
ter (D15 is the MSB). When the conversion result falls
below the value in the underrange register, the UNDR
bit in the status register sets to 1. The LED shows a -1
26
LED Segment-Display Register 1 (Read/Write)
Underrange Register (Read/Write)
MSB
D15
Bit 15
______________________________________________________________________________________
MSB
Bit 7
C0
A1
D14
D13
Bit 14
Bit 6
8300h (for 3.5-digit, -2000)
B1E0h (for 4.5-digit, -20,000)
G1
A0
D12
D11
Bit 13
Bit 5
D1
G0
D10
D9
Bit 12
Bit 4
D0
F1
D8
C0: Segment C driver bit of digit 0. The default value
turns on the LED segment.
B0: Segment B driver bit of digit 0. The default value
turns on the LED segment.
X: Don’t care.
DP2: Segment DP driver bit of digit 2. The default value
turns on the LED segment.
E1: Segment E driver bit of digit 1. The default value
turns on the LED segment.
F1: Segment F driver bit of digit 1. The default value
turns on the LED segment.
D1: Segment D driver bit of digit 1. The default value
turns on the LED segment.
G1: Segment G driver bit of digit 1. The default value
turns on the LED segment.
A1: Segment A driver bit of digit 1. The default value
turns on the LED segment.
followed by four dashes for the MAX1366 or a -1 fol-
lowed by three dashes for the MAX1368 (Table 4).
The data is represented in two’s-complement format.
Default values: 0000h
D7
Bit 11
Bit 3
E1
F0
D6
D5
Bit 10
Bit 2
DP2
E0
D4
D3
Bit 9
Bit 1
DP1
X
D2
D1
Bit 8
LSB
Bit 0
B0
0
LSB
D0