M69030 Asiliant Technologies, M69030 Datasheet - Page 235

• Manufacturer Part Number: M69030
• Manufacturer: Asiliant Technologies

Specifications of M69030

• Operating Temperature (min): 0C
• Operating Temperature Classification: Commercial
• Operating Temperature (max): 70C
• Rad Hardened: No
• Lead Free Status / Rohs Status: Supplier Unconfirmed

XRD1
read/write at I/O address 3D7h with index at I/O address 3D6h set to D1h
shared by both pipelines A and B
7-1
0
XRD2
read/write at I/O address 3D7h with index at I/O address 3D6h set to D2h
shared by both pipelines A and B
7-0
`efmp
A
&
B
A
&
B

Reserved
BitBLT Engine Idle-State Powerdown
2KHz Down Counter
69030 Databook
7
7
Power Conservation Control Register
2KHz Down Counter Register
This bit always returns the value of 0 when read.
0: Does not cause the BitBLT engine to automatically powerdown when idle.
1: Causes the BitBLT engine to automatically powerdown when idle.
Note: Use of this feature in no way affects usability of the BitBLT engine, and in no way
impedes access to the BitBLT registers. The manner in which the BitBLT engine is
programmed is not affected by the use of this feature.
This register provides the output of a looping 8-bit counter that is continuously
deincremented at a rate of 2KHz. The 2KHz frequency is derived from the same
14.318MHz reference frequency received from an external oscillator that is used as the
base frequency for the generation of both the dot clock and memory clock.
This register is meant to be used to provide a fixed time base that can be used by Intel BIOS
to properly time the various steps to perform a powerdown or powerup of the graphics
controller.
6
6
5
5
Extension Registers
(0000:000)
Reserved
32KHz Down Counter
4
4
(00h)
3
3
2
2
Revision 1.3 11/24/99
1
1
Powerdown
BitBLT Idle
(0)
0
0
14-55