upd75212a Renesas Electronics Corporation., upd75212a Datasheet - Page 36

• Manufacturer Part Number: upd75212a
• Description: 4-bit Single-chip Microcomputer
• Manufacturer: Renesas Electronics Corporation.

36
(3)
(4)
The S value varies as follows:
according to PCC setting.
Description of symbols in the addressing area column
Description of the machine cycle column
S indicates the number of machine cycles required for skip operation by an instruction having skip function.
Note
Remarks
* 1
* 2
* 3
* 4
* 5
* 6
* 7
* 8
* 9
*10
• When not skipped ................................................................................................... S = 0
• When 1-byte or 2-byte instructions are skipped ................................................. S = 1
• When 3-byte instructions are skipped (BR !addr, CALL !addr instruction) ..... S = 2
One machine cycle is equal to one cycle(=t
GETI instruction is skipped in one machine cycle.
MB = MBE • MBS
(MBS = 0, 1, 15)
MB = 0
MBE = 0 : MB = 0 (00H to 7FH)
MBE = 1 : MB = MBS (MBS = 0, 1, 15)
MB = 15, fmem = FB0H to FBFH,
MB = 15, pmem = FC0H to FFFH
addr = 0000H to 2F7FH
addr = (Current PC) – 15 to (Current PC) – 1,
caddr = 0000H to 0FFFH
faddr = 0000H to 07FFH
taddr = 0020H to 007FH
1.
2.
3.
4.
MB indicates accessible memory bank.
In *2, MB = 0 irrespective of MBE and MBS.
In *4 and *5, MB = 15 irrespective of MBE and MBS.
*6 to *10 indicate addressable areas.
(Current PC) + 2 to (Current PC) + 16
1000H to 1FFFH
2000H to 2F7FH
MB = 15 (80H to FFH)
FF0H to FFFH
(PC
(PC
(PC
13, 12
13, 12
13, 12
= 00B) or
= 01B) or
= 10B)
CY
) of CPU clock
and three time periods are available
Program Memory
Data Memory
Addressing
Addressing
PD75212A