Datasheet

78K0/Kx2-L CHAPTER 20 RESET FUNCTION
R01UH0028EJ0400 Rev.4.00 660
Sep 27, 2010
Table 20-2. Hardware Statuses After Reset Acknowledgment (1/4)
Hardware After Reset
Acknowledgment
Note 1
Program counter (PC) The contents of the
reset vector table
(0000H, 0001H) are set.
Stack pointer (SP) Undefined
Program status word (PSW) 02H
Data memory Undefined
Note 2
RAM
General-purpose registers Undefined
Note 2
Port registers 0 to 4, 6, 7, 12 (P0 to P4, P6, P7, P12) (output latches) 00H
Port mode registers 0 to 4, 6, 7, 12 (PM0 to PM4, PM6, PM7, PM12) FFH
Pull-up resistor option registers 0, 1, 3, 4, 6, 7 (PU0, PU1, PU3, PU4, PU6, PU7) 00H
Pull-up resistor option register 12 (PU12) 20H
Port input mode register 6 (PIM6) 00H
Port output mode register 6 (POM6) 00H
Reset pin mode register (RSTMASK) 00H
Port alternate switch control register (MUXSEL) 00H
Internal memory size switching register (IMS) CFH
Note 3
Notes 1. During reset signal generation or oscillation stabilization time wait, only the PC contents among the hardware
statuses become undefined. All other hardware statuses remain unchanged after reset.
2. When a reset is executed in the standby mode, the pre-reset status is held even after reset.
3. Reset signal generation makes the setting of the ROM area undefined. Therefore, set the value
corresponding to each product as indicated below after release of reset.
Products
78K0/KY2-L 78K0/KA2-L 78K0/KB2-L 78K0/KC2-L
IMS
ROM
Capacity
Internal High-Speed RAM
Capacity
μ PD78F0550,
78F0555
μ PD78F0560,
78F0565
− −
61H 4 KB 384 bytes
μ PD78F0551,
78F0556
μ PD78F0561,
78F0566
μ PD78F0571,
78F0576
μ PD78F0581,
78F0586
42H 8 KB 512 bytes
μ PD78F0552,
78F0557
μ PD78F0562,
78F0567
μ PD78F0572,
78F0577
μ PD78F0582,
78F0587
04H 16 KB 768 bytes
− − −
μ PD78F0584,
78F0589
C6H 24 KB 1 KB
− −
μ PD78F0573,
78F0578
μ PD78F0583,
78F0588
C8H 32 KB 1 KB
Remark The special function registers (SFRs) mounted depend on the product. Refer to 3.2.3 Special function
registers (SFRs).
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