c8051t617 Silicon Laboratories, c8051t617 Datasheet - Page 73

• Manufacturer Part Number: c8051t617
• Description: Mixed Signal Byte-programmable Eprom Mcu
• Manufacturer: Silicon Laboratories

SFR Definition 8.1. REG0CN: Voltage Regulator Control
Table 8.1. Internal Voltage Regulator Electrical Characteristics
–40 to +85 °C unless otherwise specified.
Input Voltage Range
Bias Current
Bit 7
Bit 6
Bits 5–1 RESERVED. Must Always Write 00000b.
Bit 0
Note:If an external clock source is used with the Memory Power Controller enabled, and the clock frequency
STOPCF BYPASS
R/W
Bit7
Parameter
STOPCF: Stop Mode Configuration.
This bit configures the regulator’s behavior when the device enters STOP mode.
0: Regulator is still active in STOP mode. Any enabled reset source will reset the device.
1: Regulator is shut down in STOP mode. Only the RST pin or power cycle can reset the
device.
BYPASS: Bypass Internal Regulator.
This bit places the regulator in bypass mode, turning off the regulator, and allowing the core
to run directly from the V
0: Normal Mode - Regulator is on.
1: Bypass Mode = Regulator is off, and the microcontroller core operates directly from the
V
IMPORTANT: Bypass mode is for use with an external regulator as the supply voltage
only. Never place the regulator in bypass mode when the V
greater than the specifications given in Table 2.1 on page 28. Doing so may cause
permanent damage to the device.
MPCE: Memory Power Controller Enable.
This bit can help the system save power at slower system clock frequencies (about 2.0 MHz
or less) by automatically shutting down the EPROM memory between clocks when informa-
tion is not being fetched from the EPROM memory.
0: Normal Mode - Memory power controller disabled (EPROM memory is always on).
1: Low Power Mode - Memory power controller enabled (EPROM memory turns on/off as
needed).
changes from slow (<2.0 MHz) to fast (> 2.0 MHz), the EPROM power will turn on, and up to 20 clocks
may be "skipped" to ensure that the EPROM power is stable before reading memory.
DD
supply voltage.
R/W
Bit6
R/W
Bit5
—
DD
R/W
Bit4
supply pin.
—
Normal Mode
Conditions
Rev. 0.3
R/W
Bit3
—
C8051T610/1/2/3/4/5/6/7
R/W
Bit2
—
Min
1.8
R/W
—
Bit1
—
DD
supply voltage is
Typ
30
—
MPCE
R/W
Bit0
Max
3.6
—
SFR Address:
00000000
Reset Value
0xC7
Units
µA
V
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