p87c51mc2 NXP Semiconductors, p87c51mc2 Datasheet - Page 16

• Manufacturer Part Number: p87c51mc2
• Description: 80c51 8-bit Microcontroller Family With Extended Memory
• Manufacturer: NXP Semiconductors

Baud Rate Selection
UART 0 and UART 1 selects the baud rate differently as shown in Tables 4 and 5:
Table 4: Baud Rate Generation for UART 0. Use T2CON.5 (RCLK) in Receive Baud Rate Selection, T2CON.4 (TCLK) in
Transmit Baud Rate Selection
Table 5: Baud Rate Generation for UART 1.
2001 Apr 06
Philips Semiconductors
* UART 0 can have different receive and transmit baud rates.
* UART 1 has the same receive and transmit baud rate.
80C51 8-bit microcontroller family with extended memory
64KB/96KB OTP with 2KB/3KB RAM
S0CON.7
S1CON.7
(SM0_0)
(SM0_1)
0
0
1
1
0
0
1
1
S0CON.6
S1CON.6
(SM1_0)
(SM1_1)
0
1
0
1
0
1
0
1
TCLK - Transmit)
(RCLK - Receive
T2CON.5/4
X
X
X
0
0
1
1
0
0
1
1
Baud Rate for UART 1
f
f
f
OSC
OSC
OSC
/(BRATE 16+16)
/(BRATE 16+16)
/(BRATE 16+16)
f
OSC
/6
(SMOD1)
PCON.7
X
X
X
X
X
0
1
0
1
0
1
*
*
*
16
BRGCON.1
(S0BRGS)
X
X
X
X
X
X
X
0
1
0
1
Receive/Transmit Baud Rate for UART 0
P87C51MB2/P87C51MC2
f
f
OSC
OSC
/(BRATE 16+16)
/(BRATE 16+16)
T1_rate/32
T1_rate/16
T2_rate/16
T1_rate/32
T1_rate/16
T2_rate/16
f
f
f
OSC
OSC
OSC
/32
/16
/6
Preliminary specification
*
*
*
*
*
*
*
*