Nec switch Uživatelský manuál stáhnout pdf (Strana 188)

CHAPTER 13 RESET FUNCTION

User’s Manual U12978EJ3V0UD

188

Table 13-1. Hardware Status After Reset (1/2)

Hardware Status After Reset

Program counter (PC)

Note 1

The contents of reset

vector tables (0000H

and 0001H) are set.

Stack pointer (SP) Undefined

Program status word (PSW) 02H

RAM Data memory Undefined

Note 2

General-purpose register Undefined

Note 2

Port (P0 to P2, P4) output latch 00H

Port mode register (PM0 to PM2, PM4) FFH

Pull-up resistor option register (PU0) 00H

Port output mode register (POM0, POM1) 00H

Processor clock control register (PCC) 02H

Oscillation stabilization time select register (OSTS) 04H

8-bit timer/event counter Timer counter (TM00, TM01) 00H

Compare register (CR00, CR01) Undefined

Mode control register (TMC00, TMC01) 00H

Watchdog timer Timer clock select register (TCL2) 00H

Mode register (WDTM) 00H

USB function Transmit receive pointer (USBPOW) 00H

Receive token PID (USBRTP) 00H

Receive token address (USBRAL, USBRAH) 00H

Receive data PID (USBRD) 00H

Receive data address (USBR0 to USBR7) Undefined

Transmit data PID bank (USBTD0, USBTD1) Undefined

Transmit data bank address (USBT00 to USBT07,

USBT10 to USBT17)

Undefined

Data/handshake packet receive byte number counter

(DRXCON)

18H

Notes 1. During reset input and oscillation stabilization time wait, only the PC contents among the hardware

statuses become undefined.

All other hardware remains unchanged after reset.

2. The post-reset values are retained in the standby mode.

1 2 ... 183 184 185 186 187 188 189 190 191 192 193 ... 233 234

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