UPD78F0034BGC-8BS-A Renesas Electronics America, UPD78F0034BGC-8BS-A Datasheet - Page 422

• 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

specification conditions (f
to 5.5 V).
operation).
20.1 External Device Expansion Function
and SFR. Connection of external devices uses ports 4 to 6. Ports 4 to 6 control address/data, read/write strobe,
wait, address strobe, etc.
420
Use the expanded-specification products of the PD780024A and 780034A Subseries, under the conventional-
The external device expansion function cannot be used under the expanded-specification conditions (high-speed
The external device expansion function connects external devices to areas other than the internal ROM, RAM,
Caution
External Expansion Mode
Single-chip mode
256-byte expansion mode
4 KB expansion mode
16 KB expansion mode
Full-address mode
When the external wait function is not used, the WAIT pin can be used as a port in all modes.
Table 20-2. State of Port 4 to 6 Pins in External Memory Expansion Mode
AD0 to AD7
A8 to A15
RD
WR
WAIT
ASTB
CHAPTER 20 EXTERNAL DEVICE EXPANSION FUNCTION
Table 20-1. Pin Functions in External Memory Expansion Mode
Name
X
= 8.38 MHz: V
Pin Function When External Device Is Connected
Port
Multiplexed address/data bus
Address bus
Read strobe signal
Write strobe signal
Wait signal
Address strobe signal
Port
Address/data
Address/data
Address/data
Address/data
DD
Port 4
0 to 7
User’s Manual U14046EJ5V0UD
= 4.0 to 5.5 V, f
Function
Port
Port
Address
Address
Address
0
X
= 5 MHz: V
1
2
Port 5
3
DD
Port
4
= 2.7 to 5.5 V, f
5
P40 to P47
P50 to P57
P64
P65
P66
P67
Alternate Function
Port
6
7
4
Port
RD, WR, WAIT, ASTB
RD, WR, WAIT, ASTB
RD, WR, WAIT, ASTB
RD, WR, WAIT, ASTB
X
= 1.25 MHz: V
5
Port 6
6
DD
7
= 1.8