56
AN83REV1
CS8900 Technical Reference Manual
Specifies the presence of LA decode circuitry on the
adapter. Refer to Section 2.3.2.2.
(Must be initial-
ized by OEM before shipping adapter.)
Bit 3: Adapter Provides HW Standby Circuitry
Specifies the presence of hardware standby circuitry
on the adapter. Refer to Section 3.7 of the
CS8900
Data Sheet. (Must be initialized by OEM before
shipping adapter.)
Bit 2: Adapter Provides 10Base-2 Circuitry
Specifies the presence of 10Base-2 circuitry on the
adapter. (Must be initialized by OEM before ship-
ping adapter.)
Bit 1: Adapter Provides AUI Circuitry
Specifies the presence of AUI circuitry on the
adapter. (Must be initialized by OEM before ship-
ping adapter.)
Bit 0: Adapter Provides 10Base-T Circuitry
Specifies the presence of 10Base-T circuitry on the
adapter. (Must be initialized by OEM before ship-
ping adapter.)
3.1.3.8 EEPROM Revision
Specifes the revision level of the format
definition used by this EEPROM. A value of
0 indicates the first revison level, a value of 1
indcates the second revison level, and so on.
3.1.3.9 Manufacturing Date
This word is the adapter’s manufacture date
encoded in 16 bits, YR-MO-DY format.
(Must be initialized by OEM before ship-
ping adapter.)
Bits 15-9: Two Least-significant Digits of Year
Seven bits for a range of 00 to 99 decimal. A roll-
over to 00 will be interpreted as the year 2000.
Bits 8-5: Month
Four bits for a range of 01 to 12.
Bits 4-0 Day
Five bits for a range of 01 to 31.
3.1.3.10 IEEE Physical Address (copy)
This field is a copy of the three words at
address 1Ch to 1Eh. (Must be initialized
by OEM before shipping adapter.)
3.1.3.11 16-bit Checksum
The checksum stored at the end of the block
is the 2’s complement of the 16-bit sum of all
the preceding words in the Driver Configu-
ration Block. (The drivers access the Con-
figuration Block as 16-bit words.) Any carry
out of the 16th bit is ignored. Since this
checksum value is calculated as the 2’s
complement of the sum of all the preceding
words in the block, a total of 0 should result
when the checksum value is added to the
sum of the previous words. (Must be initial-
ized by OEM before shipping adapter.)
3.1.3.12 EISA ID
The two EISA words make up the 32-bit
EISA Product Identification Code.
Low Word
These 16 bits make up the 3-letter identifier string of
the OEM’s EISA ID in 5-bit compressed ASCII. (A =
00001, B = 00010, C = 00011, etc.)
Bits 7-0: High order 8 bits of 16-bit value
Bits 15-8: Low order 8 bits of 16-bit value
Содержание CRYSTAL LAN CS890
Страница 26: ...26 AN83REV1 CS8900 Technical Reference Manual Figure 2 2 9 CRD8900 Top Side Routing ...
Страница 27: ...AN83REV1 27 CS8900 Technical Reference Manual Figure 2 2 10 CRD8900 Bottom Side Routing ...
Страница 36: ...36 AN83REV1 CS8900 Technical Reference Manual Figure 2 4 2 Ground connection Top layer of two layer Combo Card ...
Страница 40: ...40 AN83REV1 CS8900 Technical Reference Manual Figure 2 4 6 Component top side of four layer board ...
Страница 41: ...AN83REV1 41 CS8900 Technical Reference Manual Figure 2 4 7 5V Plane of four layer board ...
Страница 42: ...42 AN83REV1 CS8900 Technical Reference Manual Figure 2 4 8 Ground Plane of four layer board ...
Страница 43: ...AN83REV1 43 CS8900 Technical Reference Manual Figure 2 4 9 Solder side bottom of four layer board ...