tmp89fm42 TOSHIBA Semiconductor CORPORATION, tmp89fm42 Datasheet - Page 378

• Manufacturer Part Number: tmp89fm42
• Description: 8 Bit Microcontroller
• Manufacturer: TOSHIBA Semiconductor CORPORATION

22.14 AC Characteristics (UART)
22. Serial PROM Mode
RA002
22.14AC Characteristics (UART)
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 accep-
tance 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
Parameter
Parameter
Page 364
CMem2
Symbol
CMeb1
CMeb2
CMeb3
CMrsm
Symbol
CMfsm
RSsup
RXsup
CMwr
CMtr1
CMtr2
CMtr3
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
(fcgck)
(32KB)
(fcgck)
-
-
At fcgck = 1 MHz
At fcgck = 1 MHz
1.08 ms
660 Ps
540 Ps
300 Ps
160 Ps
200 Ps
430 Ps
420 Ps
140 Ps
270 Ps
1.1 ms
90 Ps
1.5 s
Minimum required time
Minimum required time
10 ms
20 ms
At fcgck = 10 MHz
At fcgck = 10 MHz
TMP89FM42
149 ms
108 Ps
110 Ps
66 Ps
54 Ps
30 Ps
16 Ps
20 Ps
43 Ps
42 Ps
14 Ps
27 Ps
9 Ps