7.2.3. Multiple external coprocessors

If multiple external coprocessors are to be attached to the ARM946E-S interface, you can combine the handshaking signals by ANDing bit 1, and ORing bit 0. In the case of two coprocessors that have handshaking signals CHSDE1, CHSEX1 and CHSDE2, CHSEX2 respectively:

CHSDE[1] = CHSDE1[1] AND CHSDE2[1]

CHSDE[0] = CHSDE1[0] OR CHSDE2[0]

CHSEX[1] = CHSEX1[1] AND CHSEX2[1]

CHSEX[0] = CHSEX1[0] OR CHSEX2[0].

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