Fujitsu F2MC-16LX Hardware Manual page 511

CHAPTER 27 EXAMPLES OF MB90F474/MB90F476 SERIAL PROGRAMMING CONNECTION
I Pins used for Fujitsu standard serial onboard writing
Table 27.1-1 "Function of pins" shows the functions of the related pins.
Table 27.1-1 Function of pins
Pin
MD2, MD1,
Mode pin
MD0
X0, X1 Oscillation pin
Programming program
P80, P81
start pin
RST Reset pin
SIN0 Serial data input pin
SOT0 Serial data output pin
SCK0 Serial clock input pin
V Power voltage supply pin
CC
V GND pin
SS
AF220/AF210/AF120/AF110
AF220/AF210/AF120/AF110
/TICS pin
Note:
To use the P80, P81, SIN0, SOT0, and SCK0 pins within the user system as well, the control
circuit shown in the Figure 27.1-2 "Pin control circuit" is required.
Using the flash microcomputer programmer's/TICS signal, the user circuit can be
disconnected in serial programming mode. Refer to the connection example.
Function
Setting MD2=1, MD1=1, and MD0=0 to enter the serial
programming mode.
As, in the serial programming mode, CPU internal operation
clock is the PLL clock multiplied-by-1, the internal operation
clock frequency is equal to the oscillation clock frequency.
Consequently, the frequencies that can be input to the high-
speed oscillation input pin for serial writing are from 1 to 20
MHz.
Set P80 to an input of "L" level and P81 to an input of "H" level.
Use UART0 for CLK sync mode.
If the programming voltage (V
the user system, connection with the flash microcomputer
programmer is not required.
Must be shared with GND of the flash microcomputer
programmer.
Figure 27.1-2 Pin control circuit
Write control pin
10 KΩ
Description
-
= 3 V
CC
MB90F474, MB90F476
Write control pin
User
±
10%) is supplied from
495