UPD78F9221CS-CAC-A Renesas Electronics America, UPD78F9221CS-CAC-A Datasheet - Page 38

• Manufacturer Part Number: UPD78F9221CS-CAC-A
• Description: MCU 8BIT 2KB FLASH 20PIN
• Manufacturer: Renesas Electronics America
• Series: 78K0S/Kx1+r

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: -

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