ZiLOG eZ80 User Manual (English)

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eZ80

CPU

User Manual

UM007714-0908 CPU Instruction Set

112

CALL cc, Mmn

Conditional CALL Subroutine

Operation

if cc {

(SP) ← PC

PC ← Mmn

}

Description

If condition

is true (1), the return address is pushed onto the stack. The return address is

the address of the instruction immediately following this

CALL

instruction. The Program

Counter (PC) is loaded with the

Mmn

operand, and execution continues at the new PC

address. The

Mmn

operand is a 16- or 24-bit address, depending on the instruction suffix

and the ADL mode. Table 47 provides detailed information.

Table 47. Conditional Operations for CALL cc, Mmn Instruction

ADL Suffix Operation if condition cc is true (1)

0 None The starting Program Counter is {MBASE, PC[15:0]}.

Push a 2-byte return address, PC15:0], onto the SPS

stack. The ADL mode bit remains cleared to 0. Load a 2-

byte logical address {mm, nn} from the instruction into

PC[15:0]. The ending Program Counter is {MBASE,

PC[15:0]} = {MBASE, mm, nn}.

1 None The starting Program Counter is PC[23:0]. Push the 3-

byte return address, PC[23:0],onto the SPL stack. The

ADL mode bit remains set to 1. Load a 3-byte address

{MM, mm, nn} from the instruction into PC[23:0]. The

ending Program Counter is PC[23:0] = {MM, mm, nn}.

0 .IS The starting Program Counter is {MBASE, PC[15:0]}.

Push the 2-byte logical return address, PC[15:0], onto

the {MBASE, SPS} stack. Push a 02h byte onto the SPL

stack, indicating a call from Z80 mode (because

ADL = 0). The ADL mode bit remains cleared to 0. Load

a 2-byte logical address {mm, nn} from the instruction

into PC[15:0]. The ending Program Counter is {MBASE,

PC[15:0]}.

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ZiLOG eZ80 Specifications

General

CPU Family	eZ80
Core	eZ80
Architecture	8-bit
Clock Speed	up to 50 MHz
Addressable Memory	16 MB
Register Size	8-bit
Serial Interfaces	UART, SPI, I2C
Operating Temperature	-40°C to +85°C
Instruction Set	Z80 compatible
On-Chip Flash Memory	Up to 256 KB
On-Chip SRAM	Up to 16 KB
Operating Voltage	3.0V to 3.6V
Package Types	LQFP, QFP
Timers	Multiple timers/counters
Power Consumption	Low power