Section 2 CPU
Rev. 1.00 Apr. 28, 2008 Page 30 of 994
REJ09B0452-0100
16 ÷ 8-bit register-register divide: 12 states
16
×
16-bit register-register multiply: 3 states
32 ÷ 16-bit register-register divide: 20 states
•
Two CPU operating modes
Normal mode*
Advanced mode
•
Power-down state
Transition to power-down state by the SLEEP instruction
CPU clock speed selection
Note: * Normal mode is not available in this LSI.
2.1.1
Differences between H8S/2600 CPU and H8S/2000 CPU
The differences between the H8S/2600 CPU and the H8S/2000 CPU are shown below.
•
Register configuration
The MAC register is supported by the H8S/2600 CPU only.
•
Basic instructions
The four instructions MAC, CLRMAC, LDMAC, and STMAC are supported by the H8S/2600
CPU only.
•
The number of execution states of the MULXU and MULXS instructions;
Execution
States
Instruction Mnemonic H8S/2600 H8S/2000
MULXU.B Rs, Rd
2
*
12
MULXU
MULXU.W Rs, ERd
2
*
20
MULXS.B Rs, Rd
3
*
13
MULXS
MULXS.W Rs, ERd
3
*
21
CLRMAC CLRMAC 1
*
LDMAC ERs,MACH
1
*
LDMAC
LDMAC ERs,MACL
1
*
STMAC MACH,ERd
1
*
STMAC
STMAC MACl,ERd
1
*
Not supported
Note:
*
This becomes one state greater immediately after a MAC instruction.
In addition, there are differences in address space, CCR and EXR register functions,
and power-down modes, etc., depending on the model.
Содержание H8S/2100 Series
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