P87C51RC2BBD,157 NXP Semiconductors, P87C51RC2BBD,157 Datasheet - Page 36

• Manufacturer Part Number: P87C51RC2BBD,157
• Description: IC 80C51 MCU 512 RAM 44LQFP
• Manufacturer: NXP Semiconductors
• Series: 87Cr

Specifications of P87C51RC2BBD,157

• Program Memory Type: OTP
• Program Memory Size: 32KB (32K x 8)
• Package / Case: 44-LQFP
• Core Processor: 8051
• Core Size: 8-Bit
• Speed: 33MHz
• Connectivity: EBI/EMI, UART/USART
• Peripherals: POR, PWM, WDT
• Number Of I /o: 32
• Ram Size: 512 x 8
• Voltage - Supply (vcc/vdd): 2.7 V ~ 5.5 V
• Oscillator Type: Internal
• Operating Temperature: 0°C ~ 70°C
• Processor Series: P87C51
• Core: 80C51
• Data Bus Width: 8 bit
• Data Ram Size: 512 B
• Interface Type: UART
• Maximum Clock Frequency: 16 MHz
• Number Of Programmable I/os: 32
• Number Of Timers: 4
• Operating Supply Voltage: 2.7 V to 5.5 V
• Maximum Operating Temperature: + 70 C
• Mounting Style: SMD/SMT
• 3rd Party Development Tools: PK51, CA51, A51, ULINK2
• Minimum Operating Temperature: 0 C
• Package: 44LQFP
• Device Core: 80C51
• Family Name: 87C
• Maximum Speed: 33 MHz
• Cpu Family: 87C
• Device Core Size: 8b
• Frequency (max): 33MHz
• Total Internal Ram Size: 512Byte
• # I/os (max): 32
• Number Of Timers - General Purpose: 3
• Operating Supply Voltage (typ): 3.3/5V
• Operating Supply Voltage (max): 5.5V
• Operating Supply Voltage (min): 2.7V
• Instruction Set Architecture: CISC
• Operating Temp Range: 0C to 70C
• Operating Temperature Classification: Commercial
• Mounting: Surface Mount
• Pin Count: 44
• Package Type: LQFP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• For Use With: OM10064 - EMULATOR 80C51 PDS51-MK2
• Eeprom Size: -
• Data Converters: -
• Lead Free Status / Rohs Status: Compliant
• Other names: 935272152157; P87C51RC2BBD; P87C51RC2BBD

Philips Semiconductors
PCA Capture Mode
To use one of the PCA modules in the capture mode either one or
both of the CCAPM bits CAPN and CAPP for that module must be
set. The external CEX input for the module (on port 1) is sampled for
a transition. When a valid transition occurs the PCA hardware loads
the value of the PCA counter registers (CH and CL) into the
module’s capture registers (CCAPnL and CCAPnH). If the CCFn bit
for the module in the CCON SFR and the ECCFn bit in the CCAPMn
SFR are set then an interrupt will be generated. Refer to Figure 26.
16-bit Software Timer Mode
The PCA modules can be used as software timers by setting both
the ECOM and MAT bits in the modules CCAPMn register. The PCA
timer will be compared to the module’s capture registers and when a
match occurs an interrupt will occur if the CCFn (CCON SFR) and
the ECCFn (CCAPMn SFR) bits for the module are both set (see
Figure 27).
High Speed Output Mode
In this mode the CEX output (on port 1) associated with the PCA
module will toggle each time a match occurs between the PCA
2003 Jan 24
80C51 8-bit microcontroller family
with 512B/1KB RAM, low voltage (2.7 to 5.5 V), low power, high
speed (30/33 MHz)
NOTE:
*User software should not write 1s to reserved bits. These bits may be used in future 8051 family products to invoke new features In that case, the reset or inactive
value of the new bit will be 0, and its active value will be 1. The value read from a reserved bit is indeterminate.
CCAPMn Address
Symbol
–
ECOMn
CAPPn
CAPNn
MATn
TOGn
PWMn
ECCFn
X
X
X
X
X
X
X
X
–
ECOMn
X
X
X
0
1
1
1
1
Not Bit Addressable
Bit:
Function
Not implemented, reserved for future use*.
Enable Comparator. ECOMn = 1 enables the comparator function.
Capture Positive, CAPPn = 1 enables positive edge capture.
Capture Negative, CAPNn = 1 enables negative edge capture.
Match. When MATn = 1, a match of the PCA counter with this module’s compare/capture register causes the CCFn bit
in CCON to be set, flagging an interrupt.
Toggle. When TOGn = 1, a match of the PCA counter with this module’s compare/capture register causes the CEXn
pin to toggle.
Pulse Width Modulation Mode. PWMn = 1 enables the CEXn pin to be used as a pulse width modulated output.
Enable CCF interrupt. Enables compare/capture flag CCFn in the CCON register to generate an interrupt.
CAPPn
0
1
0
1
0
0
0
0
–
7
CCAPM0
CCAPM1
CCAPM2
CCAPM3
CCAPM4
CAPNn
ECOMn
Figure 24. CCAPMn: PCA Modules Compare/Capture Registers
0
0
1
1
0
0
0
0
6
0DAH
0DBH
0DCH
0DDH
0DEH
Figure 25. PCA Module Modes (CCAPMn Register)
8KB/16KB/32KB/64KB OTP
MATn
CAPPn
0
0
0
0
1
1
0
1
5
TOGn
CAPNn
X
0
0
0
0
0
1
0
4
PWMn
36
MATn
0
0
0
0
0
0
1
0
3
counter and the module’s capture registers. To activate this mode
the TOG, MAT, and ECOM bits in the module’s CCAPMn SFR must
be set (see Figure 28).
Pulse Width Modulator Mode
All of the PCA modules can be used as PWM outputs. Figure 29
shows the PWM function. The frequency of the output depends on
the source for the PCA timer. All of the modules will have the same
frequency of output because they all share the PCA timer. The duty
cycle of each module is independently variable using the module’s
capture register CCAPLn. When the value of the PCA CL SFR is
less than the value in the module’s CCAPLn SFR the output will be
low, when it is equal to or greater than the output will be high. When
CL overflows from FF to 00, CCAPLn is reloaded with the value in
CCAPHn. the allows updating the PWM without glitches. The PWM
and ECOM bits in the module’s CCAPMn register must be set to
enable the PWM mode.
ECCFn
TOGn
X
X
X
X
X
X
0
0
2
No operation
16-bit capture by a positive-edge trigger on CEXn
16-bit capture by a negative trigger on CEXn
16-bit capture by a transition on CEXn
16-bit Software Timer
16-bit High Speed Output
8-bit PWM
Watchdog Timer
P87C51RA2/RB2/RC2/RD2
PWMn
1
ECCFn
MODULE FUNCTION
0
Reset Value = X000 0000B
Product data
SU01320