Appendix
A96G140/A96G148/A96A148 User’s manual
266
20.5
Flash programming
Program memory for A96G140/A96G148/A96A148 is Flash type. This Flash ROM is accessed through
four pins such as DSCL, DSDA, VDD and VSS in serial data format. For detailed information about the
Flash memory programming, please refer to
오류
!
참조
원본을
찾을
수
없습니다
..
오류
!
참조
원본
을
찾을
수
없습니다
..
Table 58 introduces corresponding pins and I/O status.
Table 58. Pins for Flash Programming
Pin name
Main chip
pin name
During programming
I/O
Description
DSCL
P01
I
Serial clock pin. Input only pin.
DSDA
P00
I/O
Serial data pin. Output port when reading and input port
when programming. Can be assigned as input/push-pull
output port.
VDD, VSS VDD, VSS
―
Logic power supply pin.
20.5.1
On-board programming
Microcontrollers need only four signal lines including VDD and VSS pins, to program the Flash ROM
using serial protocol. Therefore, on-board programming is possible if the programming signal lines are
considered at the time the PCB of application board is designed.