HD6417606 RENESAS [Renesas Technology Corp], HD6417606 Datasheet - Page 49

• Manufacturer Part Number: HD6417606
• Manufacturer: RENESAS [Renesas Technology Corp]

2.2.3
There are four 32-bit system registers, designated two multiply and accumulate registers (MACH
and MACL), a procedure register (PR), and program counter (PC).
• Multiply and accumulate registers (MAC)
• Procedure register (PR)
• Program counter (PC)
2.2.4
Table 2.1 lists the initial values of registers after a reset.
Table 2.1
Type of register
General register
Control register
System register
This register stores the results of multiplication and multiply-and-accumulate operation.
This register stores the return-destination address from subroutine procedures.
The PC indicates the point which is four bytes (two instructions) after the current execution
instruction.
System Registers
Initial Values of Registers
Initial Values of Registers
Register
R0 to R14
R15 (SP)
SR
GBR
VBR
MACH, MACL, PR
PC
Default
Undefined
SP value set in the exception handling vector table
I3 to I0: 1111 (H'F)
Reserved bits: 0
Other bits: Undefined
Undefined
H'00000000
Undefined
PC value set in the exception handling vector table
Rev. 4.00 Sep. 13, 2007 Page 23 of 502
REJ09B0239-0400
Section 2 CPU