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AT89C5122D-RDRUM Datasheet(PDF) 58 Page - ATMEL Corporation

Part # AT89C5122D-RDRUM
Description  C51 Microcontroller with USB and Smart Card Reader Interfaces
PDF  208 Pages
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Manufacturer  ATMEL [ATMEL Corporation]
Direct Link  http://www.atmel.com
Logo ATMEL - ATMEL Corporation

AT89C5122D-RDRUM Datasheet(HTML) 58 Page - ATMEL Corporation

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58
AT83R5122, AT8xC5122/23
4202F–SCR–07/2008
Figure 28.
LED Source Current
Notes: 1. When switching a low level, LEDCTRL device has a permanent current of about
N mA/15 (N is 2, 4 or 8).
2. The port must be configured as standard C51 port by means of PMOD0 and PMOD1
registers and the level of current must be programmed by means of LEDCON0 and
LEDCON1 registers before switching the led on.
Table 35.
LED Source Current
LEDx.1
LEDx.0
Port Latch Data
NMOS
PIN
Comments
00
0
1
0
LED control disabled
00
1
0
1
01
0
0
0
LED mode 2 mA
01
1
0
1
10
0
0
0
LED mode 4 mA
10
1
0
1
11
0
0
0
LED mode 10 mA
11
1
0
1
Pin
Port Latch
Data
LEDx.0
LEDx.1
NMOS
N
N
LEDCTRL



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