upd75238 Renesas Electronics Corporation., upd75238 Datasheet - Page 155
upd75238
Manufacturer Part Number
upd75238
Description
4 Bit Single-chip Microcomputer
Manufacturer
Renesas Electronics Corporation.
Datasheet
1.UPD75238.pdf
(190 pages)
- Current page: 155 of 190
- Download datasheet (2Mb)
(3) Explanation of the symbols in the addressing area field
(4) Explanation of the machine cycle column
Remarks 1. MB indicates an accessible memory bank.
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
Caution The GETI instruction is skipped in one machine cycle.
One machine cycle is equal to one cycle (= t
for selection according to the PCC and SCC settings. (See (3) in Section 4.2.)
*10
*11
*1
*2
*3
*4
*5
*6
*7
*8
*9
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.
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-3FFFH
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
= 101B) or
= 00B) or
= 01B) or
= 10B) or
= 11B) or
= 100B) or
= 110B) or
= 111B)
CY
) of the CPU clock ( ), and five types of times are available
: S = 0
: S = 2
Program
memory
addressing
Data memory
addressing
PD75238
155
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