UPD78F1142AGB-GAH-AX Renesas Electronics America, UPD78F1142AGB-GAH-AX Datasheet - Page 65
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UPD78F1142AGB-GAH-AX
Manufacturer Part Number
UPD78F1142AGB-GAH-AX
Description
MCU 16BIT 78K0R/KX3 64-LQFP
Manufacturer
Renesas Electronics America
Series
78K0R/Kx3r
Datasheet
1.UPD78F1142AGA-HAB-AX.pdf
(880 pages)
Specifications of UPD78F1142AGB-GAH-AX
Core Processor
78K/0R
Core Size
16-Bit
Speed
20MHz
Connectivity
3-Wire SIO, I²C, LIN, UART/USART
Peripherals
DMA, LVD, POR, PWM, WDT
Number Of I /o
50
Program Memory Size
64KB (64K x 8)
Program Memory Type
FLASH
Ram Size
4K x 8
Voltage - Supply (vcc/vdd)
1.8 V ~ 5.5 V
Data Converters
A/D 8x10b
Oscillator Type
Internal
Operating Temperature
-40°C ~ 85°C
Package / Case
*
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Eeprom Size
-
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
UPD78F1142AGB-GAH-AX
Manufacturer:
Renesas Electronics America
Quantity:
10 000
- Current page: 65 of 880
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3.2.1 Control registers
program counter (PC), a program status word (PSW) and a stack pointer (SP).
(1) Program counter (PC)
(2) Program status word (PSW)
3.2 Processor Registers
The 78K0R/KE3 products incorporate the following processor registers.
The control registers control the program sequence, statuses and stack memory. The control registers consist of a
The program counter is a 20-bit register that holds the address information of the next program to be executed.
In normal operation, PC is automatically incremented according to the number of bytes of the instruction to be
fetched. When a branch instruction is executed, immediate data and register contents are set.
Reset signal generation sets the reset vector table values at addresses 0000H and 0001H to the program counter.
The program status word is an 8-bit register consisting of various flags set/reset by instruction execution.
Program status word contents are stored in the stack area upon vector interrupt request acknowledgment or
PUSH PSW instruction execution and are restored upon execution of the RETB, RETI and POP PSW instructions.
Reset signal generation sets PSW to 06H.
(a) Interrupt enable flag (IE)
(b) Zero flag (Z)
(c) Register bank select flags (RBS0, RBS1)
This flag controls the interrupt request acknowledge operations of the CPU.
When 0, the IE flag is set to the interrupt disabled (DI) state, and all maskable interrupt requests are disabled.
When 1, the IE flag is set to the interrupt enabled (EI) state and interrupt request acknowledgment is
controlled with an in-service priority flag (ISP1, ISP0), an interrupt mask flag for various interrupt sources,
and a priority specification flag.
The IE flag is reset (0) upon DI instruction execution or interrupt acknowledgment and is set (1) upon EI
instruction execution.
When the operation result is zero, this flag is set (1). It is reset (0) in all other cases.
These are 2-bit flags to select one of the four register banks.
In these flags, the 2-bit information that indicates the register bank selected by SEL RBn instruction
execution is stored.
PC
19
PSW
Figure 3-13. Format of Program Status Word
IE
7
Figure 3-12. Format of Program Counter
CHAPTER 3 CPU ARCHITECTURE
Z
User’s Manual U17854EJ9V0UD
RBS1
AC
RBS0
ISP1
ISP0
CY
0
0
63
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