TS87C54X2-VCB Atmel, TS87C54X2-VCB Datasheet - Page 30

• Manufacturer Part Number: TS87C54X2-VCB
• Description: IC MCU 8BIT 16K OTP 40MHZ 44PLCC
• Manufacturer: Atmel
• Series: 87Cr

Specifications of TS87C54X2-VCB

• Core Processor: 8051
• Core Size: 8-Bit
• Speed: 40/30MHz
• Connectivity: UART/USART
• Peripherals: POR, WDT
• Number Of I /o: 32
• Program Memory Size: 16KB (16K x 8)
• Program Memory Type: OTP
• Ram Size: 256 x 8
• Voltage - Supply (vcc/vdd): 4.5 V ~ 5.5 V
• Oscillator Type: Internal
• Operating Temperature: 0°C ~ 70°C
• Package / Case: 44-PLCC
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Eeprom Size: -
• Data Converters: -

30
AT/TS8xC54/8X2
XTAL1
INT0
INT1
Active phase
Figure 11-1. Power-Down Exit Waveform
Exit from power-down by reset redefines all the SFRs, exit from power-down by external inter-
rupt does no affect the SFRs.
Exit from power-down by either reset or external interrupt does not affect the internal RAM
content.
NOTE: If idle mode is activated with power-down mode (IDL and PD bits set), the exit sequence
is unchanged, when execution is vectored to interrupt, PD and IDL bits are cleared and idle
mode is not entered.
Table 11-1.
* P o r t 0 c a n f o r c e a " z e r o " l e v e l . A " o n e " L e v e l w i l l l e a v e p o r t f l o a t i n g .
Power Down
Power Down
Mode
Idle
Idle
Program
Memory
The state of ports during idle and power-down modes
External
External
Internal
Internal
Power-down phase
ALE
1
1
0
0
Oscillator restart phase
PSEN
1
1
0
0
Port Data*
Port Data*
Floating
Floating
PORT0
Active phase
Port Data
Port Data
Port Data
Port Data
PORT1
Port Data
Port Data
Port Data
Address
PORT2
4431E–8051–04/06
Port Data
Port Data
Port Data
Port Data
PORT3