CHAPTER3: Serial Programming Connection
1. Serial Programmer
P E R I P H E R A L M A N U A L
August 31, 2015, S6E1Cx_MN710-00016-1v0-E
47
CONFIDENTIAL
When built-in high-speed CR oscillator is used as a source oscillation clock
Figure 1-3 shows a connection example of Cypress MCU Programmer when a built-in
high-speed CR oscillator is used as a source oscillation clock.
When neither crystal oscillator nor external clock is connected to X0/X1 pins, the built-in
high-speed CR oscillator is connected for communication.
The communication baud rate is 19200[bps] when built-in high-speed CR oscillator is used
The following are the restrictions when built-in high-speed CR oscillator is used
−
Because the oscillation frequency of the built-in high-speed CR oscillator would fluctuate due to
temperature and voltage change, the allowable baud rate error range might be exceeded.
−
For using the built-in high-speed CR oscillator, see "Built-in CR Oscillation Specifications" in "Data
Sheet" of the product used.
Figure 1-3 Connection Example When Built-in High-Speed CR Oscillator is Used
RS-232C
driver
P03/SIN0_0
VSS
VCC
INITX
P01/SOT0_0
Note: The pull-up resistor values shown are for example.
Select the most appropriate resistor values for each system.
MD0
Device
Serial write: 0
Serial write: 1
10kΩ
10kΩ
RS-232C
User system
MD1
