ACE1101BEMT8 Fairchild Semiconductor, ACE1101BEMT8 Datasheet - Page 29

• Manufacturer Part Number: ACE1101BEMT8
• Description: IC MCU 1KBIT EEPROM 8TSSOP
• Manufacturer: Fairchild Semiconductor
• Series: ACEX® 11xxr

Specifications of ACE1101BEMT8

• Core Processor: ACE1001
• Core Size: 8-Bit
• Speed: 4MHz
• Peripherals: Brown-out Detect/Reset, LVD, POR, PWM, WDT
• Number Of I /o: 6
• Program Memory Size: 1KB (1K x 8)
• Program Memory Type: EEPROM
• Eeprom Size: 64 x 8
• Ram Size: 64 x 8
• Voltage - Supply (vcc/vdd): 2.7 V ~ 5.5 V
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 8-TSSOP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Data Converters: -
• Connectivity: -

ACE1101 Product Family Rev. B.2
When a RESET sequence is initiated, all I/O registers will be reset
setting all I/Os to high-impedence inputs. The system clock is
restarted after the required clock start-up delay. A reset is gener-
ated by any one of the following three conditions:
• Power-on Reset (as described in Section 13.0)
• Brown-out Reset (as described in Section 11.1)
• Watchdog Reset (as described in Section 7.0)
• External Reset
The Power-On Reset (POR) circuit is guaranteed to work if the
rate of rise of V
was designed to respond to fast low to high transitions between 0V
and V
the next power-up sequence. In applications where 1) the V
is slower than 10ms/1 volt or 2) V
next power-up sequence the external reset option should be used.
18
Available only on the 14-pin package option.
CC
. The circuit will not work if V
V CC (Pin 8)
CC
0
0
1
1
18
is no slower than 10ms/1volt. The POR circuit
(as described in Section 13.0)
(Pin 7)
BOR
POR
output
output
CC
does not drop to 0v before the
CC
output
POR
does not drop to 0V before
V CC
V CC
V CC
5.0V
1.8V
1.75
0
0
0
0
V CC
V CC
0
1
0
1
BOR Output
Time
CC
rise
The external reset provides a way to properly reset the ACEx
microcontroller if POR cannot be used in the application. The
external reset pin contains an internal pull-up resistor. Therefore,
to reset the device the reset pin should be held low for at least 2ms
so that the internal clock has enough time to stabilize.
The ACEx microcontroller has an on-board oscillator trimmed to
a frequency of 2MHz who is divided down by two yielding a 1MHz
frequency. (See AC Electrical Characteristics.) Upon power-up,
the on-chip oscillator runs continuously unless entering HALT
mode or using an external clock source.
If required, an external oscillator circuit may be used depending on
the states of the CMODE bits of the initialization register. (See
Table 17) When the device is driven using an external clock, the
clock input to the device (G1/CKI) can range between DC to
4MHz. For external crystal configuration, the output clock (CKO)
is on the G0 pin. (See Figure 28) If an external crystal or RC is
used, internally the input frequency (CKI) is divided-down by four
to yield the corresponding instruction clock. If the device is
configured for an external square clock, it will not be divided.
POR Output
Pulse
(14-Pin Only)
Internal 1 MHz clock
External square clock
External crystal/resonator
External RC clock
External
Reset
Pin
A
B
Reset
circuit
output
The Reset circuit will trigger
when inputs A or B transition
from High to Low. At that time
the Global Reset signal will go
high which will reset all controller
logic. The Global Reset will go
high and stay high for around 1µs.
Global Reset
to Logic
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