UPD78F0034BGC-8BS-A Renesas Electronics America, UPD78F0034BGC-8BS-A Datasheet - Page 315

• Manufacturer Part Number: UPD78F0034BGC-8BS-A
• Description: MCU 8-Bit 78K0 CISC 32KB Flash 2.5V/3.3V/5V 64-Pin LQFP
• Manufacturer: Renesas Electronics America

Specifications of UPD78F0034BGC-8BS-A

• Package: 64LQFP
• Family Name: 78K0
• Maximum Speed: 12 MHz
• Ram Size: 1 KB
• Program Memory Size: 32 KB
• Operating Supply Voltage: 2.5|3.3|5 V
• Data Bus Width: 8 Bit
• Program Memory Type: Flash
• Number Of Programmable I/os: 51
• Interface Type: 3-Wire/UART
• On-chip Adc: 8-chx10-bit
• Operating Temperature: -40 to 85 °C
• Number Of Timers: 3

(d) Port mode register 2 (PM2)
Address: FF22H After reset: FFH
Symbol
PM2
High-speed limit timing
Low-speed limit timing
Basic timing
Baud rate error tolerance (when k = 0) =
Caution
Remark T: 5-bit counter’s source clock cycle
Port mode register 2 is used to set input/output of port 2 in 1-bit units.
To use the P24/TxD0 pin as a serial data output, clear PM24 and the output latch of P24 to 0.
To use the P23/RxD0 pin as a serial data input, and the P25/ASCK0 pin as a clock input, set PM23 and PM25
to 1. At this time, the output latches of P23 and P25 can be either 0 or 1.
PM2 is set by a 1-bit or 8-bit memory manipulation instruction.
RESET input sets PM2 to FFH.
PM2n
Figure 16-7. Error Tolerance (When k = 0), Including Sampling Errors
7
1
0
1
The above error tolerance value is the value calculated based on the ideal sample point.
In the actual design, allow margins that include errors of timing for detecting a start bit.
Output mode (output buffer on)
Input mode (output buffer off)
6
1
START
START
START
CHAPTER 16 SERIAL INTERFACE UART0
R/W
30.45T
PM25
33.55T
32T
5
User’s Manual U14046EJ5V0UD
D0
D0
D0
I/O mode selection of P2n pin (n = 0 to 5)
60.9T
15.5
320
PM24
67.1T
64T
4
100 = 4.8438 (%)
256T
D7
PM23
3
D7
288T
D7
P
PM22
301.95T
sampling
304.5T
2
304T
Ideal
point
P
15.5T
STOP
320T
P
STOP
15.5T
PM21
335.5T
1
336T
STOP
Sampling error
0.5T
352T
PM20
0
313