Pdmac Status Register (Pdmstatus) 0Xd228 - Toshiba TMPR4937 Manual

10.4.63 PDMAC Status Register (PDMSTATUS)
63
47
31 30 29
Reserved
15 12
Reserved
ERRINT
Bit Mnemonic Field Name
63:30 Reserved
29:24 REQCNT Request Delay
Time Counter
23:20 FIFOCNT FIFO Hold Count
19:18 FIFOWP FIFO Write
Pointer
17:16 FIFORP FIFO Read
Pointer
15:12 Reserved
Error Interrupt
11 ERRINT
Status
10 DONEINT Normal Transfer
Complete
Interrupt Status
9 CHNEN Chain Enable
Reserved
Reserved
24
REQCNT
R
0x00
11 10 9 8
CHNEN ACCMP NCCMP NTCMP
DONEINT XFRACT
R R R R
0x0 0x0 0x0 0x0
Request Delay Counter (Default: 0x00)
This field indicates the request delay time counter value as 16 × n when the
6-bit value of this field is n.
FIFO Valid Entry Count (Default: 0x0)
This field indicates the number of bytes that was written in the FIFO but not
yet read. This is a diagnostic function.
FIFO Write Pointer (Default: 0x0)
This field indicates the next Write position in the FIFO. This is a diagnostic
function.
FIFO Read Pointer (Default: 0x0)
This field indicates the next Read position in the FIFO. This is a dianostic
function.
Error Interrupt Status (Default: 0x0)
Indicates whether to signal an error interrupt.
1: An error interrupt request exists.
0: No error interrupt request exists.
Normal Transfer Complete Interrupt Status (Default: 0x0)
Indicates whether a Normal Transfer Complete Interrupt is signaled.
This bit becomes "1" when either the Normal Chain Complete bit (NCCMP)
is set and the Normal Chain Complete Interrupt Enable bit (NCCMPIE) is
set, or when the Normal Data Transfer Complete bit (NTCMP) is set and
the Normal Data Transfer Complete Interrupt Enable bit (NTCMPIE) is set.
1: A Normal Transfer Complete Interrupt request exists.
0: No Normal Transfer Complete Interrupt request exists.
Chain Enable (Default: 0x0)
This bit is a copy of the Chain Enable bit in the PDMAC Configuration
Register.
Figure 10.4.61 Status Register (1/2)
10-95
Chapter 10 PCI Controller
0xD228
23 20
FIFOCNT
R
0x0
7 6 5 4
CFGERR
Reserved
R R/W1C R/W1C R/W1C R/W1C R/W1C R/W1C : Type
0x0 0x0 0x0
Description
48
: Type
: Initial value
32
: Type
: Initial value
19 18 17 16
FIFOWP FIFORP
R R : Type
0x0 0x0 : Initial value
3 2 1 0
PCIERR
CHNERR
DATAERR
0x0 0x0 0x0 0x0 : Initial value
Read/Write
⎯
R
R
R
R
⎯
R
R
R