Z51F3220FNX Datasheet, PDF (279/312 Pages) Zilog, Inc. – Z8051 Series 8-Bit Microcontrollers

Z51F3220
Product Specification
13. RESET
13.1 Overview
The following is the hardware setting value.
Table 13-1 Reset State
On Chip Hardware
Program Counter (PC)
Accumulator
Stack Pointer (SP)
Peripheral Clock
Control Register
Initial Value
0000h
00h
07h
On
Refer to the Peripheral Registers
13.2 Reset Source
The Z51F3220 has five types of reset sources. The following is the reset sources.
- External RESETB
- Power ON RESET (POR)
- WDT Overflow Reset (In the case of WDTEN = `1`)
- Low Voltage Reset (In the case of LVREN = `0 `)
- OCD Reset
13.3 RESET Block Diagram
Ext RESET
Disable by FUSE
LVR
LVR Enable
POR RST
WDT RST
WDT RSTEN
OCD RST
OCD RSTEN
RESET Noise
Canceller
RESET Noise
Canceller
SQ
R
IFBIT
(BIT Overflow)
Figure 13.1 RESET Block Diagram
Internal
Reset
PS029902-0212
PRELIMINARY
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