HD6417641 RENESAS [Renesas Technology Corp], HD6417641 Datasheet - Page 305

• Manufacturer Part Number: HD6417641
• Manufacturer: RENESAS [Renesas Technology Corp]

11.2.12 Branch Destination Register (BRDR)
BRDR is a 32-bit read-only register. BRDR stores bits 27 to 0 in the address of the branch
destination instruction. BRDR has the flag bit that is set to 1 when a branch occurs. This flag bit is
cleared to 0 when BRDR is read, the setting to enable PC trace is made, or BRDR is initialized by
a power-on reset. Other bits are not initialized by a power-on reset. The eight BRDR registers
have a queue structure and a stored register is shifted at every branch.
Bit
31
30 to 28
27 to 0
Bit Name
DVF

BDA27 to
BDA0
Initial
Value
0
All 0

R/W
R
R
R
Description
BRDR Valid Flag
Indicates whether a branch destination address is
stored. When a branch destination address is fetched,
this flag is set to 1. This flag is cleared to 0 by reading
BRDR.
0: The value of BRDR register is invalid
1: The value of BRDR register is valid
Reserved
These bits are always read as 0. The write value
should always be 0.
Branch Destination Address
Store bits 27 to 0 of the branch destination address.
Rev. 4.00 Sep. 14, 2005 Page 255 of 982
Section 11 User Break Controller (UBC)
REJ09B0023-0400