UPD78F0413GA-GAM-AX NEC, UPD78F0413GA-GAM-AX Datasheet - Page 64

• Manufacturer Part Number: UPD78F0413GA-GAM-AX
• Description: 8BIT UC, 32K FLASH, 1KB RAM, LCD
• Manufacturer: NEC

Specifications of UPD78F0413GA-GAM-AX

• Controller Family/series: UPD78F
• No. Of I/o's: 30
• Ram Memory Size: 1024Byte
• Cpu Speed: 10MHz
• No. Of Timers: 8
• No. Of Pwm: RoHS Compliant
• Core Size: 8bit
• Program Memory Size: 32KB
• Oscillator Type: External, Internal

3.3 Instruction Address Addressing
each byte) automatically according to the number of bytes of an instruction to be fetched each time another instruction
is executed. When a branch instruction is executed, the branch destination information is set to PC and branched by
the following addressing (for details of instructions, refer to the 78K/0 Series Instructions User’s Manual (U12326E)).
3.3.1 Relative addressing
64
An instruction address is determined by contents of the program counter (PC), and is normally incremented (+1 for
[Function]
[Illustration]
The value obtained by adding 8-bit immediate data (displacement value: jdisp8) of an instruction code to the
start address of the following instruction is transferred to the program counter (PC) and branched.
displacement value is treated as signed two’s complement data ( 128 to +127) and bit 7 becomes a sign bit.
In other words, relative addressing consists of relative branching from the start address of the following
instruction to the 128 to +127 range.
This function is carried out when the BR $addr16 instruction or a conditional branch instruction is executed.
PC
When S = 0, all bits of
When S = 1, all bits of
15
15
15
are 0.
are 1.
8
PC
+
CHAPTER 3 CPU ARCHITECTURE
7
S
User’s Manual U18698EJ1V0UD
6
jdisp8
0
0
0
...
PC indicates the start address
of the instruction after the BR instruction.
The