AT89C5132-ROTUL Atmel, AT89C5132-ROTUL Datasheet - Page 44

• Manufacturer Part Number: AT89C5132-ROTUL
• Description: IC 8051 MCU FLASH 64K USB 80TQFP
• Manufacturer: Atmel
• Series: AT89C513xr

Specifications of AT89C5132-ROTUL

• Core Processor: C52X2
• Core Size: 8-Bit
• Speed: 20MHz
• Connectivity: IDE/ATAPI, I²C, MMC, PCM, SPI, UART/USART, USB
• Peripherals: I²S, POR, WDT
• Number Of I /o: 44
• Program Memory Size: 64KB (64K x 8)
• Program Memory Type: FLASH
• Eeprom Size: 4K x 8
• Ram Size: 2.25K x 8
• Voltage - Supply (vcc/vdd): 2.7 V ~ 3.3 V
• Data Converters: A/D 2x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 80-TQFP, 80-VQFP
• Cpu Family: 89C
• Device Core: 8051
• Device Core Size: 8b
• Frequency (max): 40MHz
• Interface Type: IDE/SPI/UART/USB
• Total Internal Ram Size: 2.25KB
• # I/os (max): 44
• Number Of Timers - General Purpose: 2
• Operating Supply Voltage (typ): 3V
• Operating Supply Voltage (max): 3.3V
• Operating Supply Voltage (min): 2.7V
• On-chip Adc: 2-chx10-bit
• Instruction Set Architecture: CISC
• Operating Temp Range: -40C to 85C
• Operating Temperature Classification: Industrial
• Mounting: Surface Mount
• Pin Count: 80
• Package Type: TQFP
• Package: 80TQFP
• Family Name: 89C
• Maximum Speed: 40 MHz
• Operating Supply Voltage: 3 V
• Data Bus Width: 8 Bit
• Number Of Programmable I/os: 44
• Number Of Timers: 2
• Maximum Clock Frequency: 20 MHz
• Data Ram Size: 2304 B
• Mounting Style: SMD/SMT
• A/d Bit Size: 10 bit
• A/d Channels Available: 2
• Height: 1.45 mm
• Length: 14.1 mm
• Maximum Operating Temperature: + 85 C
• Minimum Operating Temperature: - 40 C
• Supply Voltage (max): 3.3 V
• Supply Voltage (min): 2.7 V
• Width: 14.1 mm
• For Use With: AT89OCD-01 - USB EMULATOR FOR AT8XC51 MCU
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

11. Power Management
11.1
11.1.1
44
Reset
AT89C5132
Cold Reset
2 power reduction modes are implemented in the AT89C5132: the Idle mode and the Power-
down mode. These modes are detailed in the following sections. In addition to these power
reduction modes, the clocks of the core and peripherals can be dynamically divided by 2 using
the X2 mode detailed in Section “X2 Feature”, page 12.
In order to start-up (cold reset) or to restart (warm reset) properly the microcontroller, an high
level has to be applied on the RST pin. A bad level leads to a wrong initialization of the internal
registers like SFRs, Program Counter… and to unpredictable behavior of the microcontroller. A
proper device reset initializes the AT89C5132 and vectors the CPU to address 0000h. RST input
has a pull-down resistor allowing power-on reset by simply connecting an external capacitor to
V
rectly by an internal reset source such as the watchdog timer. Resistor value and input
characteristics are discussed in the Section “DC Characteristics” of the AT89C5132 datasheet.
The status of the Port pins during reset is detailed in
Figure 11-1. Reset Circuitry and Power-On Reset
Table 16. Pin Conditions in Special Operating Modes
Note:
2 conditions are required before enabling a CPU start-up:
•
•
If one of these 2 conditions are not met, the microcontroller does not start correctly and can exe-
cute an instruction fetch from anywhere in the program space. An active level applied on the
RST pin must be maintained till both of the above conditions are met. A reset is active when the
level V
oscillator are not stabilized. 2 parameters have to be taken into account to determine the reset
pulse width:
•
•
Reset
Idle
Power-down
DD
V
The level on X1 input pin must be outside the specification (V
V
Oscillator startup time.
as shown in Figure 11-1. A warm reset can be applied either directly on the RST pin or indi-
DD
DD
Mode
IH1
1. Refer to Section “Audio Output Interface”, page 75.
RST
must reach the specified V
rise time,
is reached and when the pulse width covers the period of time where V
Floating
Port 0
RST input circuitry
Data
Data
VDD
VSS
P
Port 1
High
Data
Data
DD
range
Port 2
Data
Data
High
Port 3
High
Data
Data
From Internal
Reset Source
To CPU Core
and Peripherals
Table
Port 4
16.
High
Data
Data
IH
, V
Port 5
High
Data
Data
IL
Power-on Reset
)
VDD
+
Floating
MMC
Data
Data
RST
4173E–USB–09/07
DD
and the
Audio
Data
Data
1