Freescale Semiconductor POWERPC MPC860T - Manual (Page 35)

MOTOROLA Chapter 6. Programming Model 6-3
PRELIMINARYÑSUBJECT TO CHANGE WITHOUT NOTICE
Table 6-2 describes the ADDR_LOW Þelds.
6.2.2 RAM Perfect Match Address High (ADDR_HIGH)
The ADDR_HIGH register, shown in Figure 6-2, is written by and must be initialized by
the user. It contains bytes 4 and 5 of the 6-byte address used to compare with the destination
address Þeld of the receive frames. Byte 0 is the Þrst byte sent at the start of the frame.
Table 6-3 describes the ADDR_HIGH Þelds.
6.2.3 RAM Hash Table High (HASH_TABLE_HIGH)
The HASH_TABLE_HIGH register, shown in Figure 6-3, contains the upper 32 bits of the
64-bit hash table used in address recognition for receive frames with a multicast address. It
is written by and must be initialized by the user
Table 6-2. ADDR_LOW Field Descriptions
Bits Name Description
0Ð31 ADDR_LOW Bytes in the 6-byte address: 0 (bits 0Ð7), 1 (bits 8Ð15), 2 (bits 16Ð23) and 3 (bits 24Ð31)
Bits 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
Field ADDR_HIGH BYTE 4 ADDR_HIGH BYTE 5
Reset UndeÞned
R/W Read/write
Addr 0xE04
Bits 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31
Field Ñ
Reset UndeÞned
R/W Read/write
Addr 0xE06
Figure 6-2. ADDR_HIGH Register
Table 6-3. ADDR_HIGH Field Descriptions
Bits Name Description
0Ð15 ADDR_HIGH Bytes of the 6-byte address: 4 (bits 0Ð7) and 5 (bits 8Р15)
16Р31 С Reserved. Should be cleared by the host processor.
F
re
e
sc
a
le
S
e
m
ic
o
n
d
u
c
to
r,
I
Freescale Semiconductor, Inc.
For More Information On This Product,
Go to: www.freescale.com
n
c
.
..