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RL78/D1A User's Manual: Hardware - Renesas

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Under development<br />

Preliminary document<br />

Specifications in this document are tentative and subject to change.<br />

<strong>RL78</strong>/<strong>D1A</strong> CHAPTER 3 CPU ARCHITECTURE<br />

3.3.4 Register direct addressing<br />

[Function]<br />

Register direct addressing stores in the program counter (PC) the contents of a general-purpose register pair<br />

(AX/BC/DE/HL) and CS register of the current register bank specified with the instruction word as 20-bit data, and<br />

specifies the program address. Register direct addressing can be applied only to the CALL AX, BC, DE, HL, and BR<br />

AX instructions.<br />

Figure 3-25. Outline of Register Direct Addressing<br />

CS<br />

OP code<br />

PC PCS PCH PCL<br />

R01UH0317EJ0004 Rev. 0.04 133<br />

Feb. 22, 2013<br />

rp

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