HD6417660 RENESAS [Renesas Technology Corp], HD6417660 Datasheet - Page 74

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

2.3
The CPU of this LSI provides thirty-three 32-bit registers: 24 general registers, five control
registers, three system registers, and one program counter.
General Registers: This LSI incorporates 24 general registers: R0_BANK0 to R7_BANK0,
R0_BANK1 to R7_BANK1, and R8 to R15. R0 to R7 are banked. The processing mode and the
register bank (RB) bit in the status register (SR) determine which set of banked registers
(R0_BANK0 to R7_BANK0 or R0_BANK1 to R7_BANK1) are accessed as general registers.
System Registers: This LSI incorporates the multiply and accumulate registers (MACH/MACL)
and procedure register (PR) as system registers. These registers can be accessed regardless of the
processing mode.
Program Counter: The program counter (PC) stores the value obtained by adding 4 to the current
instruction address.
Control Registers: This LSI incorporates the status register (SR), global base register (GBR),
save status register (SSR), save program counter (SPC), and vector base register (VBR) as control
registers. Only GBR can be accessed in user mode. Control registers other than GBR can be
accessed only in privileged mode.
Table 2.1 shows the register values after a reset. Figure 2.6 shows the register configurations in
each processing mode.
Table 2.1
Note:
Rev. 1.00, 02/04, page 36 of 804
Register Type
General registers R0_BANK0 to R7_BANK0,
System registers
Program counter
Control registers
*
Register Descriptions
Initialized by a power-on reset or manual reset.
Register Initial Values
Registers
R0_BANK1 to R7_BANK1,
R8 to R15
MACH, MACL, PR
PC
SR
GBR, SSR, SPC
VBR
Initial Values*
Undefined
Undefined
H'A0000000
MD bit = 1, RB bit = 1, BL bit = 1, I3 to I0 bits =
B'1111 (H'F), DSP bit = 0, reserved bits = all 0,
other bits = undefined
Undefined
H'00000000