UPD78F0034BGC-8BS-A Renesas Electronics America, UPD78F0034BGC-8BS-A Datasheet - Page 425

• 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

20.2 External Device Expansion Function Control Registers
(1) Memory expansion mode register (MEM)
Address: FF47H After reset: 00H R/W
Symbol
MEM
The external device expansion function is controlled by the following two registers.
• Memory expansion mode register (MEM)
• Memory expansion wait setting register (MM)
MEM sets the external expansion area.
MEM is set by a 1-bit or 8-bit memory manipulation instruction.
RESET input clears MEM to 00H.
Notes 1. When the memory expansion mode is set, if an area other than the external expansion area
Caution
MM2
7
0
0
0
0
1
1
1
2. The full-address mode allows external expansion to the entire 64 KB address space except
Other than above
Figure 20-2. Format of Memory Expansion Mode Register (MEM)
is accessed, the read value is undefined.
for the internal ROM, RAM, and SFR areas, and the reserved areas.
When using the falling edge detection function of port 4, be sure to set MEM to 01H.
MM1
6
0
0
0
1
0
0
1
CHAPTER 20 EXTERNAL DEVICE EXPANSION FUNCTION
MM0
5
0
0
1
1
0
1
1
Single-chip/memory
expansion mode selection P40 to P47 P50 to P53 P54, P55 P56, P57 P64 to P67
Single-chip mode
Port 4 falling edge
detection mode
Memory
expansion mode
mode
Setting prohibited
User’s Manual U14046EJ5V0UD
4
0
Note 1
256-byte
4 KB
mode
16 KB
mode
Full-address
mode
3
0
Note 2
Port mode
AD0 to AD7 Port mode
MM2
2
P40 to P47, P50 to P57, P64 to P67 pin state
A8 to A11 Port mode
MM1
1
A12, A13 Port mode
MM0
0
A14, A15
P64 = RD
P65 = WR
P66 =WAIT
P67 = ASTB
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