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November, 2018 Rev.1.4
13. RESET
13.1 Overview
When a reset event occurs, the CPU immediately stops whatever it is doing and all internal logics
except for BODR register is initialized. The external reset pin(P20) shares normal I/O pin and the
functionality is defined by fuse configuration(FUSE_CONF register). The hardware configuration right
after reset event is as follows.
On Chip Hardware
Initial Value
Program Counter (PC)
0000
H
Accumulator
00
H
Stack Pointer (SP)
07
H
Peripheral Clocks
On
Control Registers
Refer to Peripheral Registers
Brown-Out Detector
Enabled on power-on-reset
Table 13-1 Internal status when a reset is asserted
13.2 Reset source
Reset can be caused by a power-on-reset (nPOR) event, configuration reset by software, watchdog
overflow, voltage drop detection by BOD, OCD command, or by assertion of an external active-low
reset pin. Five of reset sources except for power-on-reset can be configured whether to be used as a
reset source or not.
-. External reset pin (P20) (Share with P20 pin. Active low)
-. Power-on reset (nPOR, Active low)
-. WDT overflow (when WDTEN is ‘1’ and WDTRSON is ‘1’)
-. Configuration reset by software (nSW)
-. BOD reset (when BODEN is ‘1’)
NOTE
-. OCD command (When debugger issues a command)
13.3 Block Diagram
WDT Overflow
Disable by FUSE
RESET Noise
Canceller
BOD Reset
Control Logic
R Q
S
Internal
RESETB
IFBIT
(BIT Overflow)
OCD RSTB
Ext RESETB
WDTRSON
nPOR
BOD Enable
BODOUT0
WDTEN
nSW
Figure 13-1 Block Diagram of Reset Circuit
Содержание MC96FR364B
Страница 17: ...MC96FR364B November 2018 Rev 1 4 17 4 PACKAGE DIMENSION...
Страница 18: ...MC96FR364B 18 November 2018 Rev 1 4 Figure 4 1 PKG DIMENSION 28 TSSOP...
Страница 23: ...MC96FR364B November 2018 Rev 1 4 23 6 3 REMOUT Port Data PAD VDD Figure 6 3 REMOUT port...
Страница 69: ...November 2018 Rev 1 4 69 Initial value 00H BIT 7 0 BIT counter value...