SAK-C868-1SR BA Infineon Technologies, SAK-C868-1SR BA Datasheet - Page 20

• Manufacturer Part Number: SAK-C868-1SR BA
• Description: IC MCU 8BIT 8KB RAM TSSOP-38-1
• Manufacturer: Infineon Technologies
• Series: C5xx/C8xxr

Specifications of SAK-C868-1SR BA

• Core Processor: C800
• Core Size: 8-Bit
• Speed: 40MHz
• Connectivity: UART/USART
• Peripherals: Brown-out Detect/Reset, PWM, WDT
• Number Of I /o: 18
• Program Memory Size: 8KB (8K x 8)
• Program Memory Type: RAM
• Ram Size: 512 x 8
• Voltage - Supply (vcc/vdd): 3 V ~ 3.6 V
• Data Converters: A/D 5x8b
• Oscillator Type: External
• Operating Temperature: -40°C ~ 125°C
• Package / Case: 38-TSSOP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Other names: SAKC8681SRBAXT; SP000014357

Reset and Brownout
The reset input is an active low input. An internal Schmitt trigger is used at the input for
noise rejection. The RESET pin must be held low for at least tbd usec. But the CPU will
only exit from reset condition after the PLL lock had been detected.
During RESET at transition from low to high, C868 will go into normal mode if ALE/BSL
is high and bootstrap loading mode if ALE/BSL is low. A pullup to V
ground is recommended for pin ALE/BSL. TXD should have a pullup to V
not be stimulated externally during reset, as a logic low at this pin will cause the chip to
go into test mode if ALE/BSL is low.
Figure 10
internal pullup resistance.
Figure 10
An on-chip analog circuit detects brownout, if the core voltage V
threshold voltage V
active for tbd usec then the device will reset. When V
V
clocks. Bit BO in the PMCON0 register is set when brownout detected if brownout
detection was enabled, this bit is cleared by hardware reset RESET and software. All
ports are tristated during brownout.
The V
maximum value of 1.8V.
Data Sheet
THRESHOLD
V
DDP
THRESHOLD
a)
RESET
shows the possible reset circuits, note that the RESET pin does not have an
C868 BA
while RESET is high, the reset is released once PLL is locked for 4096
Reset Circuitries
has a nominal value of 1.47V, a minimum value of 1.1V and a
THRESHOLD
momentarily while RESET pin is high. If this detection is
&
b)
RESET
C868 BA
20
DDC
recovers by exceeding
DDC
V
DDP
DDP
DDP
dips below the
or pulldown to
V 1.0, 2003-05
c)
RESET
C868 BA
and should
C868