GS6150 Datasheet, PDF (33/64 Pages) Gennum Corporation – Automatic or Manual Rate Selection

MSB
Command Word
UNIT ADDRESS
LSB
ADDRESS
R/W
B’CAST
ALL
EMEM AUTOINC
A11
A10
A9
A8
A7
A6
A5
A4
A3
A2
A1
A0
7-bit CSR address field providing up to
128 configuration registers.
5-bit UNIT ADDRESS field providing up to
32 devices to be connected on a single CS.
Auto increment read/write access when set.
Single read write access when reset.
Extended memory mode. When set, the extended memory mode is
enabled. When reset, normal GSPI addressing is enabled.
Data Word
When set, the UNIT ADDRESS field is ignored and
all data accesses are actioned by the device.
When reset, the Unit Address is used to
manage data accesses in the device.
Read access when this bit is set.
Write access when this bit is reset.
D15
D14
D13
D12
D11
D10
D9
D8
D7
D6
D5
D4
D3
D2
D1
D0
Figure 4-8: Command and Data Word Format
When EMEM is set to 1, the Address Word is extended to 23 bits. The Command and Data
Word format will be extended by another 16 bits, and is shown in Figure 4-9 below.
MSB
Command Word
UNIT ADDRESS
LSB
ADDRESS[22:16]
R/W
B’CAST
ALL
EMEM AUTOINC
A11
A10
A9
A8
A7
A22
A21
A20
A19
A18
A17
A16
ADDRESS[15:0]
A15
A14
A13
A12
A11
A10
A9
A8
A7
A6
A5
A4
A3
A2
A1
A0
Data Word
D15
D14
D13
D12
D11
D10
D9
D8
D7
D6
D5
D4
D3
D2
D1
D0
Figure 4-9: Command and Data Word Format with EMEM set to 1
GS6150
Final Data Sheet
PDS-060127
Rev.2
March 2015
www.semtech.com
33 of 64
Proprietary & Confidential