h8s-2158 Renesas Electronics Corporation., h8s-2158 Datasheet - Page 229

• Manufacturer Part Number: h8s-2158
• Description: Renesas 16-bit Single-chip Microcomputer H8s Family/h8s/2100 Series
• Manufacturer: Renesas Electronics Corporation.

Bit
7
6
5
4
3
2
1, 0
Bit Name
BOVF_R
BOVF_W
FULL
EMPTY
OVER_R
OVER_W
—
Initial Value
0
0
0
0
0
0
All 1
R/W
R/(W)
R/(W)
R/(W)
R/(W)
R/(W)
R/(W)
R
Description
Boundary Overflow (at reading)
Indicates detection of boundary overflow in
RAR or TMP (when the read temporary pointer
is selected). This flag can be masked by the
BOVF_RE bit in DTCRB.
Boundary Overflow (at writing)
Indicates detection of boundary overflow in
WAR or TMP (when the write temporary pointer
is selected). This flag can be masked by the
BOVF_WE bit in DTCRB.
FIFO Full
Indicates detection of FIFO full (generation of
WAR = RAR or TMP = WAR (when the read
temporary pointer is selected) according to the
write bus cycle). This flag can be masked by
the FULLE bit in DTCRB.
FIFO Empty
Indicates detection of FIFO empty (generation
of WAR = RAR or TMP = RAR (when the write
temporary pointer is selected) according to the
read bus cycle). This flag can be masked by the
EMPTYE bit in DTCRB.
FIFO Over Read
Indicates detection of FIFO empty (when a read
request is generated while RAR = WAR or TMP
= RAR (when the write temporary pointer is
selected)).
FIFO Over Write
Indicates detection of FIFO full (when a write
request is generated while WAR = RAR or TMP
= WAR (when the read temporary pointer is
selected)).
Reserved
These bits are always read as 1 and cannot be
modified.
Rev. 3.00 Jan 25, 2006 page 177 of 872
Section 8 RAM-FIFO Unit (RFU)
REJ09B0286-0300