em78f644nso28s ELAN Microelectronics Corp, em78f644nso28s Datasheet - Page 171

• Manufacturer Part Number: em78f644nso28s
• Description: Flash Series 8-bit Microcontroller
• Manufacturer: ELAN Microelectronics Corp

Product Specification (V1.0) 05.05.2010
(This specification is subject to change without further notice)
Bit14 Bit13 Bit12 Bit11 Bit10
SC3
SC2
SC1
6.19.3 Customer ID Register (Word 2)
6.19.3.1 EM78F644/642/641/544/542/541N Code Option Word 2
Bits 12 ~ 9 (SC3 ~ SC0): Calibrator of sub frequency (WDT frequency, auto calibration)
Bit 8:
Bit 7:
Bits 6 ~ 5:
Bits 4 ~ 0 (ID4 ~ ID0):
6.19.3.2 EM78F648/548N Code Option Word 2
Bits 14 ~ 11 (SC3 ~ SC0): Calibrator of sub frequency (WDT frequency, auto calibration)
Bits 10 ~ 9:
Bits 8 ~ 0 (ID8 ~ ID0):
6.20 Instruction Set
Each instruction in the Instruction Set is a 13-bit word for EM78F664N/F662N/F661N
/F564N/F562N/F561N and 15-bit for EM78F648/548N, divided into an OP code and
one or more operands. Normally, all instructions are executed within one single
instruction cycle (one instruction consists of two oscillator periods), unless the
program counter is changed by instructions "MOV R2,A", "ADD R2,A", or by
instructions of arithmetic or logic operation on R2 (e.g., "SUB R2,A", "BS(C) R2,6",
"CLR R2", ⋅etc.). Under this condition, the execution takes two instruction cycles.
If for some reasons, the specification of the instruction cycle is not suitableyou’re your
certain applications, try to modify the instruction as follows:
A) Change one instruction cycle to consist of four oscillator periods.
B) "LJMP", "LCALL", "TBRD", "RET", "RETL", "RETI", or the conditional skip ("JBS",
Bit 12 Bit 11 Bit 10 Bit 9
SC3
"JBC", "JZ", "JZA", "DJZ", "DJZA") commands which were tested to be true, are
executed within two instruction cycles. The instructions that are written to the
program counter also take two instruction cycles.
SC0
SC2
“0”
SC1
Bit9
“0”
SC0
Not used, set to “0” all the time.
Not used, set to “1” all the time.
Not used, set to “0” all the time.
Customer’s ID code.
Bit8
Not used, set to “0” all the time.
Customer’s ID code.
ID8
Bit 8
“0”
Word 1
Bit7
EM78F648/644/642/641/548/544/542/541N
ID7
Bit 7
“1”
Word 2
Bit6
ID6
Bit 6
“0”
Bit5
Bit 5
ID5
“0”
Bit4
Bit 4
ID4
ID4
Bit 3
Bit3
ID3
ID3
8-Bit Microcontroller
Bit 2
Bit2
ID2
ID2
Bit 1
ID1
Bit1
ID1
Bit 0
• 161
ID0
Bit0
ID0