參數(shù)資料
型號(hào)： UPD754202GSA
廠商： NEC Corp.
英文描述： 4-BIT SINGLE-CHIP MICROCONTROLLERS
中文描述： 4位單晶片微控制器
文件頁(yè)數(shù)： 37/66頁(yè)
文件大?。?/td> 302K
代理商： UPD754202GSA
37
μ
PD754202, 754202(A)
(3) Explanation of symbols under addressing area column
*1
MB = MBEMBS
(MBS = 0, 15)
*2
MB = 0
*3
MBE = 0 : MB = 0 (000H-07FH)
MB = 15 (F80H-FFFH)
MBE = 1 : MB = MBS (MBS = 0, 15)
Data memory addressing
*4
MB = 15, fmem = FB0H-FBFH, FF0H-FFFH
*5
MB = 15, pmem = FC0H-FFFH
*6
addr = 0000H-07FFH
*7
addr
= (Current PC) – 15 to (Current PC) – 1
(Current PC) + 2 to (Current PC) + 16
addr1 = (Current PC) – 15 to (Current PC) – 1
(Current PC) + 2 to (Current PC) + 16
Program memory addressing
*8
caddr = 0000H-07FFH
*9
faddr = 0000H-07FFH
*10
taddr = 0020H-007FH
*11
addr1 = 0000H-07FFH
Remarks 1.
MB indicates memory bank that can be accessed.
In *2, MB = 0 independently of how MBE and MBS are set.
In *4 and *5, MB = 15 independently of how MBE and MBS are set.
*6 to *11 indicate the areas that can be addressed.
2.
3.
4.
(4) Explanation of number of machine cycles column
S denotes the number of machine cycles required by skip operation when a skip instruction is executed.
The value of S varies as follows.
When no skip is made: S = 0
When the skipped instruction is a 1- or 2-byte instruction: S = 1
When the skipped instruction is a 3-byte instruction
Note
: S = 2
Note
3-byte instruction: BR !addr, BRA !addr1, CALL !addr, or CALLA !addr1 instruction
Caution The GETI instruction is skipped in one machine cycle.
One machine cycle is equal to one cycle of the CPU clock (= t
CY
); time can be selected from among four
types by setting PCC.
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