tmp89fm42a TOSHIBA Semiconductor CORPORATION, tmp89fm42a Datasheet - Page 401

• Manufacturer Part Number: tmp89fm42a
• Description: 8 Bit Microcontroller
• Manufacturer: TOSHIBA Semiconductor CORPORATION

22.14
AC Characteristics (UART)
RA003
22.14
Table 22-24 UART Timing-1
Table 22-25 UART Timing-2
Time from when MCU receives 0x86 to when it echoes back
Time from when MCU receives 0x79 to when it echoes back
Time from when MCU receives an operation command to when it
echoes back
Time required to calculate the checksum (flash memory)
Time required to calculate the checksum (RAM)
Time when MCU receives Intel Hex data to when it transmits over-
write detection data
Time from when MCU receives data (number of read bytes) to when
it transmits memory data
Time from when MCU receives data (mask ROM emulation setting
data) to when it echoes back
Time required to enable the security program
Time required to keep MODE and RESET pins at L after power-on
Time from when MODE and RESET pins are set to H to the accept-
ance of RXD
Time from when MCU echoes back 0x86 to the acceptance of RXD
Time from when MCU echoes back 0x79 to the acceptance of RXD
Time from when MCU echoes back an operation command to the
acceptance of RXD
Time from when the execution of a current command is completed
to the acceptance of the next operation command
AC Characteristics (UART)
Parameter
Parameter
Page 382
CMem2
Symbol
CMeb1
CMeb2
CMeb3
CMrsm
Symbol
CMfsm
RSsup
RXsup
CMtr1
CMtr2
CMtr3
CMwr
CMnx
CMrd
CMrp
Approx. 1493340
Clock frequency
Clock frequency
Approx. 1080
Approx. 1100
Approx. 660
Approx. 540
Approx. 300
Approx. 160
Approx. 200
Approx. 430
Approx. 420
Approx. 140
Approx. 270
Approx. 90
(32KB)
(fcgck)
(fcgck)
-
-
At fcgck = 1 MHz
At fcgck = 1 MHz
1.08 ms
660 μs
540 μs
300 μs
160 μs
200 μs
430 μs
420 μs
140 μs
270 μs
1.1 ms
90 μs
1.5 s
Minimum required time
Minimum required time
10 ms
20 ms
TMP89FM42A
At fcgck = 10 MHz
At fcgck = 10 MHz
149 ms
108 μs
110 μs
66 μs
54 μs
30 μs
16 μs
20 μs
43 μs
42 μs
14 μs
27 μs
9 μs