C8051F587-IMR Silicon Labs, C8051F587-IMR Datasheet - Page 153
C8051F587-IMR
Manufacturer Part Number
C8051F587-IMR
Description
8-bit Microcontrollers - MCU 50 MIPS 96 kB 8 kB SPI 2xUART
Manufacturer
Silicon Labs
Datasheet
1.C8051F585-IQR.pdf
(356 pages)
Specifications of C8051F587-IMR
Rohs
yes
Core
8051
Data Bus Width
8 bit
Processor Series
C8051
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SFR Definition 17.1. VDM0CN: V
SFR Address = 0xFF; SFR Page = 0x00
17.3. External Reset
The external RST pin provides a means for external circuitry to force the device into a reset state. Assert-
ing an active-low signal on the RST pin generates a reset; an external pullup and/or decoupling of the RST
pin may be necessary to avoid erroneous noise-induced resets. See Table 5.4 for complete RST pin spec-
ifications. The PINRSF flag (RSTSRC.0) is set on exit from an external reset.
17.4. Missing Clock Detector Reset
The Missing Clock Detector (MCD) is a one-shot circuit that is triggered by the system clock. If the system
clock remains high or low formore than the value specified in Table 5.4, the one-shot will time out and gen-
erate a reset. After a MCD reset, the MCDRSF flag (RSTSRC.2) will read 1, signifying the MCD as the
reset source; otherwise, this bit reads 0. Writing a 1 to the MCDRSF bit enables the Missing Clock Detec-
tor; writing a 0 disables it. The state of the RST pin is unaffected by this reset.
Name
Reset
Bit
4:0
Type
7
6
5
Bit
VDDSTAT
VDMLVL
VDMEN
Unused
VDMEN
Name
Varies
R/W
7
VDDSTAT
V
This bit turns the V
tem resets until it is also selected as a reset source in register RSTSRC (SFR Def-
inition 17.2). Selecting the V
may generate a system reset. In systems where this reset would be undesirable, a
delay should be introduced between enabling the V
reset source. See Table 5.4 for the minimum V
0: V
1: V
V
This bit indicates the current power supply status (V
0: V
1: V
V
0: V
1: V
tem includes code that writes to and/or erases Flash.
Read = 00000b; Write = Don’t care.
Varies
DD
DD
DD
R
6
DD
DD
DD
DD
DD
DD
Monitor Enable.
Status.
Monitor Level Select.
Monitor Threshold is set to VRST-HIGH. This setting is required for any sys-
Monitor Disabled.
Monitor Enabled.
is at or below the V
is above the V
Monitor Threshold is set to VRST-LOW
VDMLVL
R/W
5
0
DD
DD
DD
monitor circuit on/off. The V
Monitor Control
monitor threshold.
Rev. 1.2
DD
R
4
0
DD
monitor threshold.
monitor as a reset source before it has stabilized
Function
R
3
0
DD
C8051F58x/F59x
DD
Monitor turn-on time.
R
2
0
DD
DD
Monitor cannot generate sys-
Monitor and selecting it as a
Monitor output).
R
1
0
R
0
0
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