MPCBL5524A1D Intel, MPCBL5524A1D Datasheet - Page 36

• Manufacturer Part Number: MPCBL5524A1D
• Manufacturer: Intel

Specifications of MPCBL5524A1D

• Lead Free Status / Rohs Status: Supplier Unconfirmed

Getting Started
3.10
36
Table 2.
Table 3.
Intel NetStructure
Programming the LEDS
The ZT 5524 / MPCBL5524 includes two user-controlled, bi-color (amber/green), LEDs located
on the connector plate (see
through bits 0-3 of the Power/LED Control Register (Port E5h) (see
Control
As shown below, two bits each are used to control the state of User LEDs 0 and 1. Since bi-color
LEDs are used, there are three states for each LED: green, amber, and off. Both LEDs may be
turned on at the same time.
User LED States
The LED bits are in the same register as other functions. It is important not to change the state of
other bits in this register when modifying the User LED status. The following code demonstrates
the mechanism for modifying the bits for User LED 1:
Code for Modifying Bits of User LED 1 (Sheet 1 of 2)
User LED 1
Bit 2
Bit 3
User LED 2
Bit 0
Bit 1
; set USER LED 1 ON (GREEN)
cli
in
and al, F3h
or
out E5h, al
sti
; set USER LED 1 ON (AMBER)
cli
in
and al, F3h
or
out E5h, al
sti
; set LED OFF
cli
al, E5h
al, E5h
al, 08h
al, 04h
Bit
(E5h)”). The LEDs are turned off after a power cycle or a reset.
®
ZT 5524 / MPCBL5524 High-Performance System Master Processor Board TPS
Code
1
0
1
0
Amber
Amber
Figure 1 on page
0
1
0
1
Green
Green
; clear interrupts
; read current state
; preserve other register bits
; set USER LED 1 (GREEN and enabled)
; output new value for register
; re-enable interrupts
; clear interrupts
; read current state
; preserve other register bits
; set USER LED 1 (AMBER and enabled)
; output new value for register
; re-enable interrupts
; clear interrupts
State
13). The user LEDs are software programmable
0
0
0
0
Both Off
Both Off
Description
1
1
1
1
Both On
Both On
Appendix B, “Video/LED