Specifications

38 SAM0025A-062397 ESS Technology, Inc.
ES1879 DATA SHEET
CONFIGURATION
PRELIMINARY
FM Alias I/O Base Address (62h, R/W)
I/O base address of FM alias, bits 11:8. Four locations.
FM Alias I/O Base Address (63h, R/W)
I/O base address of FM alias, bits 7:2.
MPU-401 I/O Base Address (64h, R/W)
I/O base address of MPU-401, bits 11:8. (MPU-401 may
also be accessible through LDN 3.) Two locations.
MPU-401 I/O Base Address (65h, R/W)
I/O base address of MPU-401, bits 7:2.
Interrupt Request Level Select 0 (70h, R/W)
Interrupt request level select 0.
Bit Definitions:
Interrupt Request Type Select 0 (71h, R)
Interrupt request type select 0. Returns 2 (low-to-high
transition).
Interrupt Request Level Select 1 (72h, R/W)
Interrupt request level select 1.
Bit Definitions:
Interrupt Request Type Select 1 (73h, R)
Interrupt request type select 1. Returns 2 (low-to-high
transition).
DMA Channel Select 0 (74h, R)
Returns 4 (no DMA channel selected).
Bit Definitions:
DMA Channel Select 1 (75h, R)
Returns 4 (no DMA channel selected).
Bit Definitions:
0A[11:8]
765 43 2 1 0
A[7:2] 0
765 43 2 1 0
0A[11:8]
765 43 2 1 0
A[7:2] 0
765 43 2 1 0
0 Data
765 43 2 1 0
Bits Name Description
7:4 – Reserved. Always write 0.
3:0 Data Select which interrupt level used for Interrupt 0.
000 00 0 1 0
765 43 2 1 0
0 Data
765 43 2 1 0
Bits Name Description
7:4 – Reserved. Always write 0.
3:0 Data Select which interrupt level used for Interrupt 1.
0000001 0
7654321 0
0 Data
7654321 0
Bits Name Description
7:3 – Reserved. Always write 0.
2:0 Data Select which channel is in use for DMA 0.
0 Data
7654321 0
Bits Name Description
7:3 – Reserved. Always write 0.
2:0 Data Select which channel is in use for DMA 1.