UPD78F9221CS-CAC-A Renesas Electronics America, UPD78F9221CS-CAC-A Datasheet - Page 38
UPD78F9221CS-CAC-A
Manufacturer Part Number
UPD78F9221CS-CAC-A
Description
MCU 8BIT 2KB FLASH 20PIN
Manufacturer
Renesas Electronics America
Series
78K0S/Kx1+r
Datasheet
1.UPD78F9221MC-5A4-A.pdf
(418 pages)
Specifications of UPD78F9221CS-CAC-A
Core Processor
78K0S
Core Size
8-Bit
Speed
10MHz
Connectivity
LIN, UART/USART
Peripherals
LVD, POR, PWM, WDT
Number Of I /o
15
Program Memory Size
2KB (2K x 8)
Program Memory Type
FLASH
Ram Size
128 x 8
Voltage - Supply (vcc/vdd)
2 V ~ 5.5 V
Data Converters
A/D 4x10b
Oscillator Type
Internal
Operating Temperature
-40°C ~ 85°C
Package / Case
*
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Eeprom Size
-
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3.2.2 General-purpose registers
(AX, BC, DE, and HL).
names (R0 to R7 and RP0 to RP3).
36
A general-purpose register consists of eight 8-bit registers (X, A, C, B, E, D, L, and H).
In addition each register being used as an 8-bit register, two 8-bit registers in pairs can be used as a 16-bit register
Registers can be described in terms of function names (X, A, C, B, E, D, L, H, AX, BC, DE, and HL) and absolute
SP
SP + 1
SP + 2
SP
Lower half
register pairs
Upper half
register pairs
POP rp
instruction
15
Figure 3-12. General-Purpose Register Configuration (1/2)
Figure 3-11. Data to Be Restored from Stack Memory
16-bit processing
DE
BC
HL
AX
SP
CHAPTER 3 CPU ARCHITECTURE
User’s Manual U16898EJ6V0UD
SP + 1
SP + 2
(a) Function names
SP
0
RET instruction
PC15 to PC8
PC7 to PC0
7
8-bit processing
H
D
E
B
C
A
X
L
SP
SP + 1
SP + 2
SP + 3
SP
0
RETI instruction
PC15 to PC8
PC7 to PC0
PSW
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