P80C557E4EFB NXP Semiconductors, P80C557E4EFB Datasheet - Page 33

• Manufacturer Part Number: P80C557E4EFB
• Manufacturer: NXP Semiconductors

Specifications of P80C557E4EFB

• Cpu Family: 80C
• Device Core: 80C51
• Device Core Size: 8b
• Frequency (max): 16MHz
• Interface Type: I2C/UART
• Program Memory Type: ROMLess
• Program Memory Size: Not Required
• Total Internal Ram Size: 1KB
• # I/os (max): 40
• Number Of Timers - General Purpose: 3
• Operating Supply Voltage (typ): 5V
• Operating Supply Voltage (max): 5.5V
• Operating Supply Voltage (min): 4.5V
• On-chip Adc: 8-chx10-bit
• Instruction Set Architecture: CISC
• Operating Temp Range: -40C to 85C
• Operating Temperature Classification: Industrial
• Mounting: Surface Mount
• Pin Count: 80
• Package Type: PQFP
• Lead Free Status / Rohs Status: Compliant

1. These bit rates are for “fast-mode” I
Philips Semiconductors
When SIO1 is in a master mode serial clock frequency is
determined by the clock rate bits CR2, CR1 and CR0. The various
bit rates are shown in Table 25.
Table 25.
NOTE:
The data shown in Table 25 do not apply to SIO1 in a slave mode. In
the slave modes, SIO1 will automatically synchronize with any clock
frequency up to 400kHz.
Serial status register S1STA
S1STA is a read only register.
The contents of the status register may be used as a vector to a
service routine. This optimizes the response time of the software
and consequently that of the I
Table 26. Description of S1STA bits
The following is a list of the status codes:
Table 27. MST/TRX mode
1999 Mar 02
Single-chip 8-bit microcontroller
CR2
1
1
1
1
0
0
0
0
S1STA (D9H)
S1STA VALUE
S1STA.7 to 3
S1STA.2 to 0
Selection of I
08H
10H
18H
20H
28H
30H
38H
BIT
CR1
0
0
1
1
0
0
1
1
2
C-bus.
2
C-bus bit rate
SC4
5-bit status code
These bits are held LOW (for service routine vector increment 8)
A START condition has been transmitted
A repeated START condition has been transmitted
SLA and W have been transmitted, ACK has been received
SLA and W have been transmitted, ACK received
DATA and S1DAT has been transmitted, ACK received
DATA and S1DAT has been transmitted, ACK received
Arbitration lost in SLA, R/W or DATA
7
2
C bus applications and cannot be used for bit rates up to 100 kbit/sec.
CR0
0
1
0
1
0
1
0
1
SC3
6
Figure 31. Serial status (S1STA) register.
SC2
5
33
SC1
4
200
300
400
P83C557E4/P80C557E4/P89C557E4
12MHz
100
50
75
3.75
7.5
1
1
1
DESCRIPTION
FUNCTION
SC0
BIT RATE (kHz) at f
3
0
2
CLK
1
0
400
16MHz
100
266.7
66.7
10
5
–
–
1
Product specification
1
0
0