EZ80F91MCU ZILOG [Zilog, Inc.], EZ80F91MCU Datasheet - Page 289

• Manufacturer Part Number: EZ80F91MCU
• Description: eZ80Acclaim-TM Flash Microcontrollers
• Manufacturer: ZILOG [Zilog, Inc.]

PS019209-0504
EMAC Transmit Lower Boundary Pointer Register—Low and High Bytes
The EMAC Transmit Lower Boundary Pointer is set to the start of the Transmit
buffer in EMAC shared memory. See Tables 161 and 162.
Table 161. EMAC Transmit Lower Boundary Pointer Register—Low Byte
(EMAC_TLBP_L = 0042h)
Table 162. EMAC Transmit Lower Boundary Pointer Register—High Byte
(EMAC_TLBP_H = 0043h)*
Bit
Reset
CPU Access
Note: R/W = Read/Write.
Bit
Position
[7:0]
EMAC_TLBP_L
Bit
Reset
CPU Access
Note: R/W = Read/Write.
Bit
Position
[7:0]
EMAC_TLBP_H
Note: *Bits 7:5 are not used by the EMAC; these bits return 000.
Value
00h–
FFh
Value
00h–
FFh
R/W
P R E L I M I N A R Y
R
7
0
7
1
Description
These bits represent the Low byte of the 2-byte Transmit
Lower Boundary Pointer value, {EMAC_TLBP_H,
EMAC_TLBP_L}. Bit 7 is bit 7 of the 16-bit value. Bit 0 is bit
0 (lsb) of the 16-bit value.
Description
These bits represent the High byte of the 2-byte Transmit
Lower Boundary Pointer value, {EMAC_TLBP_H,
EMAC_TLBP_L}. Bit 7 is bit 15 (msb) of the 16-bit value.
Bit 0 is bit 8 of the 16-bit value.
R/W
R
6
0
6
1
R/W
R
5
0
5
0
R/W
R/W
4
0
4
0
R/W
R/W
Ethernet Media Access Controller
3
0
3
0
Product Specification
R/W
R/W
2
0
2
0
eZ80F91 MCU
R/W
R/W
1
0
1
0
R/W
R/W
0
0
0
0
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