UPD75218 NEC, UPD75218 Datasheet - Page 31

• Manufacturer Part Number: UPD75218
• Description: 4-BIT SINGLE-CHIP MICROCOMPUTER
• Manufacturer: NEC

Remarks 1. MB indicates an accessible memory bank.
Caution The GETI instruction is skipped in one machine cycle.
(3) Explanation of the symbols in the addressing area field
(4) Explanation of the machine cycle column
One machine cycle is equal to one cycle of the CPU clock
selection according to the PCC setting.
S represents the number of machine cycles required when a skip instruction with the skip function performs
a skip operation. S assumes one of the following values:
• When no skip operation is performed
• When a 1-byte instruction or 2-byte instruction is skipped : S = 1
• When a 3-byte instruction is skipped
2. For *2, MB is always 0 irrespective of MBE and MBS.
3. For *4 and *5, MB is always 15 irrespective of MBE and MBS.
4. *6 to *11 indicate each addressable area.
*10
*11
*1
*2
*3
*4
*5
*6
*7
*8
*9
MB = MBE•MBS
(MBS = 0, 1, 2, 3, or 15)
MB = 0
MBE = 0: MB = 0 (00H-7FH)
MBE = 1: MB = MBS (MBS = 0, 1, 2, 3, or 15)
MB = 15, fmem = FB0H-FBFH or
MB = 15, pmem = FC0H-FFFH
addr = 0000H-3F7FH
addr = (Current PC) - 15 to (Current PC) - 1 or
caddr = 0000H-0FFFH (PC
faddr = 0000H-07FFH
taddr = 0020H-007FH
addr1 = 0000H-7F7FH
(Current PC) + 2 to (Current PC) + 16
1000H-1FFFH (PC
2000H-2FFFH (PC
3000H-3FFFH (PC
4000H-4FFFH (PC
5000H-5FFFH (PC
6000H-6FFFH (PC
7000H-7F7FH (PC
MB = 15 (80H-FFH)
FF0H-FFFH
14,13,12
14,13,12
14,13,12
14,13,12
14,13,12
14,13,12
14,13,12
14,13,12
= 000B) or
= 001B) or
= 010B) or
= 011B) or
= 100B) or
= 101B) or
= 110B) or
= 111B)
(= t
CY
: S = 0
: S = 2
), and three types of times are available for
Data memory
addressing
Program
memory
addressing
PD75218
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