SAM47 INSTRUCTION SET KS57C2308/P2308/C2316/P2316
5-4
Flexible Bit Manipulation
In addition to normal bit manipulation instructions like set and clear, the SAM47 instruction set can also perform
bit tests, bit transfers, and bit Boolean operations. Bits can also be addressed and manipulated by special bit
addressing modes. Three types of bit addressing are supported:
—mema.b
—memb.@L
—@H+DA.b
The parameters of these bit addressing modes are described in more detail in Table 5-2.
Table 5-2. Bit Addressing Modes and Parameters
Addressing Mode Addressable Peripherals Address Range
mema.b ERB, EMB, IS1, IS0, IEx, IRQx FB0H–FBFH
Ports FF0H–FFFH
memb.@L Ports and BSC FC0H–FFFH
@H+DA.b All bit-manipulatable peripheral hardware All bits of the memory bank specified by
EMB and SMB that are bit-manipulatable
Instructions Which Have Skip Conditions
The following instructions have a skip function when an overflow or borrow occurs:
XCHI INCS
XCHD DECS
LDI ADS
LDD SBS
If there is an overflow or borrow from the result of an increment or decrement, a skip signal is generated and a
skip is executed. However, the carry flag value is unaffected.
The instructions BTST, BTSF, and CPSE also generate a skip signal and execute a skip when they meet a skip
condition, and the carry flag value is also unaffected.
Instructions Which Affect the Carry Flag
The only instructions which do not generate a skip signal, but which do affect the carry flag are as follows:
ADC LDB C,(operand)
SBC BAND C,(operand)
SCF BOR C,(operand)
RCF BXOR C,(operand)
CCF IRET
RRC