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HDLC CONTROLLER
8.7.19 TX BUFFER DESCRIPTOR MAXIMUM COUNT REGISTER
Tx Buffer Descriptor maximum count register sets tx buffer descriptor maximum counts. For example, if you set
the HTXBDMAXCNT register to "0xFFF", then you can use 1(2
register to "0xFFE", "0xFFC", "0xFF8", "0xFF0", "0xFE0", then you can use 2(2
buffer descriptor for each buffer descriptor maximum count register setting. You can set the HTXBDMAXCNT
register up to "0x800", so you can use maximum 2048(2
Descriptor used, the Tx Buffer Descriptor Address Pointer points the start address.
Table 8-27. HTXBDMAXCNTA, HTXBDMAXCNTB, and HTXBDMAXCNTC Register
Registers
HTXBDMAXCNTA
HTXBDMAXCNTB
HTXBDMAXCNTC
8.7.20 RX BUFFER DESCRIPTOR MAXIMUM COUNT REGISTER
Rx Buffer Descriptor maximum count register sets rx buffer descriptor maximum counts. For example, if you set
the HRXBDMAXCNT register to "0xFFF", then you can use 1(2
HRXBDMAXCNT register to "0xFFE", "0xFFC", "0xFF8", "0xFF0", "0xFE0", then you can use 2(2
4
5
16(2
), 32(2
) buffer descriptor for each buffer descriptor maximum count register setting. You can set the
HRXBDMAXCNT register up to "0x8002
HRXBDMAXCNT Buffer Descriptor used, the Rx Buffer Descriptor Address Pointer points the start address.
Table 8-28. HRXBDMAXCNTA, HRXBDMAXCNTB, and HRXBDMAXCNTC Register
Registers
HRXBDMAXCNTA
HRXBDMAXCNTB
HRXBDMAXCNTC
8-54
Address
R/W
0×F01000C8
R/W
R/W
0×F01100C8
0×F01200C8
R/W
1
, so you can use maximum 2048(2
Address
R/W
0×F01000CC
R/W
0×F01100CC
R/W
R/W
0×F01200CC
0
) buffer descriptor. If you set the HTXBDMAXCNT
11
) buffer descriptors. After HTXBDMAXCNT Buffer
Description
Tx buffer descriptor maximum count control
register
Tx buffer descriptor maximum count control
register
Tx buffer descriptor maximum count control
register
0
) buffer descriptor. If you set the
Description
Rx buffer descriptor maximum count
control register
Rx buffer descriptor maximum count
control register
Rx buffer descriptor maximum count
control register
1
2
3
), 4(2
), 8(2
), 16(2
Reset Value
0×XXXXXFFF
0×XXXXXFFF
0×XXXXXFFF
1
), 4(2
11
) buffer descriptors. After
Reset Value
0×XXXXXFFF
0×XXXXXFFF
0×XXXXXFFF
S3C2500B
4
5
), 32(2
)
2
3
), 8(2
),
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