Hardware Status After Reset - NEC PD78076 User Manual

Program counter (PC) Note 1
Stack pointer (SP)
Program status word (PSW)
RAM
Port (Output latch)
Port mode register (PM0 to PM3, PM5 to PM10, PM12, PM13)
Pull-up resistor option register (PUOH, PUOL)
Processor clock control register (PCC)
Oscillation mode selection register (OSMS)
Memory size switching register (IMS)
Internal expansion RAM size switching register (IXS)
External bus type selection register (EBTS)
Memory expansion mode register (MM)
Oscillation stabilization time select register (OSTS)
16-bit timer/event counter
8-bit timer/event counter
1 and 2
Notes 1. During reset input or oscillation stabilization time wait, only the PC contents among the hardware
statuses become undefined. All other hardware statuses remains unchanged after reset.
2. In the standby mode, the status before the reset is held even after the reset.
3. The values after reset depend on the product.
PD78076, 78076Y : CCH
PD78P078, 78P078Y : CFH
CHAPTER 25 RESET FUNCTION
Table 25-1. Hardware Status after Reset (1/3)
Hardware
Data memory
General register
Ports 0 to 3, Port 7, 9, 10, 12, 13
(P0 to P3, P7, P9, P10, P12, P13)
Port 4 to Port 6, Port 8 (P4 to P6, P8)
Timer register (TM0)
Capture/compare register (CR00, CR01)
Clock selection register (TCL0)
Mode control register (TMC0)
Capture/compare control register 0 (CRC0)
Output control register (TOC0)
Timer register (TM1, TM2)
Compare registers (CR10, CR20)
Clock select register (TCL1)
Mode control registers (TMC1)
Output control register (TOC1)
PD78078, 78078Y : CFH
Status after Reset
The contents of reset vector tables
(0000H and 0001H) are set.
Undefined
02H
Undefined Note 2
Undefined Note 2
00H
Undefined
FFH
00H
04H
00H
Note3
0AH
00H
10H
04H
00H
Undefined
00H
00H
04H
00H
00H
Undefined
00H
00H
00H
555