73s1217f68im Maxim Integrated Products, Inc., 73s1217f68im Datasheet - Page 59
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73s1217f68im
Manufacturer Part Number
73s1217f68im
Description
Bus-powered 80515 System-on-chip With Usb, Iso 7816 / Emv, Pinpad And More
Manufacturer
Maxim Integrated Products, Inc.
Datasheet
1.73S1217F68IM.pdf
(140 pages)
- Current page: 59 of 140
- Download datasheet (2Mb)
the need for an external current limiting resistor. This pin may be used as general purpose output with
the programmed pull-down current and a strong (CMOS) pull-up, if enabled. The analog block must be
enabled when this output is being used to drive the selected output current.
This pin may be used as an input with consideration of the programmed output current and level. The
register bit when read, indicates the state of the pin.
LED Control Register (LEDCtl): 0xFFF3
1.7.12 LED Driver
The 73S1217F provides a single dedicated output pin for driving an LED. The LED driver pin can be
configured as a current source that will pull to ground to drive an LED that is connected to VDD without
Rev. 1.2
LEDCtl.7
LEDCtl.6
LEDCtl.5
LEDCtl.4
LEDCtl.3
LEDCtl.2
LEDCtl.1
LEDCtl.0
Bit
MSB
Symbol
LPUEN
LEDD0
ISET.1
ISET.0
–
–
–
–
–
LPUEN
0 = Pull-up is enabled for the LED pin.
These two bits control the drive current (to ground) for the LED driver pin.
Current levels are:
00 = 0ma(off)
01 = 2ma
10 = 4ma
11 = 10ma
Write data controls output level of pin LED0. Read will report level of pin LED0.
ISET.1
Table 61: The LEDCtl Register
ISET.0
0xFF
LEDD3 LEDD2 LEDD 1 LEDD0
Function
LSB
59
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