HD6417660 RENESAS [Renesas Technology Corp], HD6417660 Datasheet - Page 708

• Manufacturer Part Number: HD6417660
• Description: Renesas 32-Bit RISC Microcomputer
• Manufacturer: RENESAS [Renesas Technology Corp]

25.2.12 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.
Rev. 1.00, 02/04, page 670 of 804
Bit
31
30 to 28 
27 to 0
Bit Name
DVF
BDA27 to BDA0 
Initial
Value
0
All 0
R/W Description
R
R
R
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.