Valid Data Byte Number (Datan); Free Area Byte Number (Freen); Read Start Address (Nra) - Renesas H8S/2158 User Manual

Section 8 RAM-FIFO Unit (RFU)
8.2.6

Valid Data Byte Number (DATAN)

DATAN is 11-bit status data allocated to bits 10 to 0 in FSTR.
Bit Bit Name
31 —
to
11
10 —
to
0
8.2.7

Free Area Byte Number (FREEN)

FREEN is 11-bit status data allocated to bits 10 to 0 in FSTR.
Bit Bit Name
31 —
to
11
10 —
to
0
8.2.8

Read Start Address (NRA)

NRA is 32-bit status data allocated to bits 31 to 0 in FSTR.
Bit Bit Name
31 —
to
0
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REJ09B0286-0300
Initial Value R/W
All 0 R
All 0 R
Initial Value R/W
All 0 R
All 0 R
Initial Value R/W
Undefined R
Description
Reserved
These bits are always read as 0 and cannot be
modified.
Valid Data Byte Number
These bits indicate the number of bytes of valid
data that can be read by FIFO in each pointer
set.
Description
Reserved
These bits are always read as 0 and cannot be
modified.
Free Area Byte Number
These bits indicate the number of bytes of the
free area that can be written to FIFO in each
pointer set.
Description
Read Start Addresses 31 to 0
The RAM address is calculated by BAR + RAR