UPD78F0034BGC-8BS-A Renesas Electronics America, UPD78F0034BGC-8BS-A Datasheet - Page 337

• 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

(2) Transfer start
Caution
Remarks 1. f
(b) Port mode registers 2, 3 (PM2, PM3)
Address: FF22H After reset: FFH
Address: FF23H After reset: FFH
• SIO3n operation control bit (CSIE3n) = 1
• After an 8-bit serial transfer, either the internal serial clock is stopped or SCK3n is set to high level.
<Transfer start timing>
• Transmit/transmit and receive mode (MODEn = 0)
• Receive-only mode (MODEn = 1)
Caution
A serial transfer starts when the following two conditions have been satisfied and transfer data has been set (or
read) to serial I/O shift register 3n (SIO3n).
<Transfer start conditions>
Symbol
PM2
Symbol
PM3
Transfer starts when writing to SIO3n.
Transfer starts when reading from SIO3n.
These registers set the input/output of ports 2 and 3 in 1-bit units.
To use the P21/SO30 and P35/SO31 pins as serial data output, and the P22/SCK30 and P36/SCK31 pins
as clock output, clear PM21, PM35, PM22, PM36, and the output latches of P21, P35, P22, and P36 to 0.
To use the P20/SI30 and P34/SI31 pins as serial data input, and the P22/SCK30 and P36/SCK31 pins as
clock input, set PM20, PM34, PM22, and PM36 to 1.
At this time, the output latches of P20, P34, P22, and P36 can be either 0 or 1.
PM2 and PM3 are set by a 1-bit or 8-bit memory manipulation instruction.
RESET input sets PM2 and PM3 to FFH.
2. n = 0, 1:
Do not rewrite the value of CSIM3n during transfer. However, CSIE3n can be rewritten using
a 1-bit memory manipulation instruction.
After data has been written to SIO3n, transfer will not start even if the CSIE3n bit value is set
to 1.
PM2n
PM3n
n = 0:
X
: Main system clock oscillation frequency
7
1
0
1
7
1
0
1
Output mode (output buffer on)
Input mode (output buffer off)
Output mode (output buffer on)
Input mode (output buffer off)
CHAPTER 17 SERIAL INTERFACES SIO30 AND SIO31
PD780024A, 780034A Subseries
PD780024AY, 780034AY Subseries
PM36
6
1
6
R/W
R/W
PM25
PM35
5
5
User’s Manual U14046EJ5V0UD
I/O mode selection of P2n pin (n = 0 to 5)
I/O mode selection of P3n pin (n = 0 to 6)
PM24
PM34
4
4
PM23
PM33
3
3
PM22
PM32
2
2
PM21
PM31
1
1
PM20
PM30
0
0
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