Rainbow Electronics DS3170 - Manual (Page 130)

DS3170 DS3/E3 Single-Chip Transceiver
130 of 233
Bits 1 to 0: General Purpose IO 1 Select [1:0] (GPIO1S[1:0]). These bits determine the function of the GPIO1
pin.
00 = Input
01 = Port A status output selected by
PORT.CR4 :GPIOA[3:0] in port control registers
10 = Output logic 0
11 = Output logic 1
Register Name: GL.ISR
Register Description: Global Interrupt Status Register
Register Address: 010h
Bit
# 15 14 13 12 11 10 9 8
Name -- -- -- -- -- -- -- --
Bit # 7 6 5 4 3 2 1 0
Name -- -- -- PISR -- -- -- GSR
Bit 4: Port Interrupt Status Register (PISR) This bit is set when any of the bits in the port interrupt status
registers (
PORT.ISR ) are set. The INT interrupt pin will be driven low when this bit is set and the GL.ISRIE .PISRIE
interrupt enable bit is enabled.
Bit 0: Global Status Register Interrupt Status (GSR) This bit is set when any of the latched status register bits
in the global latched status register (
GL.SRL ) are set and enabled for interrupt. The INT interrupt pin will be driven
low when this bit is set and the GL.ISRIE.GSRIE interrupt enable bit is enabled.
Register Name:
GL.ISRIE
Register Description: Global Interrupt Status Register Interrupt Enable
Register Address: 012h
Bit
# 15 14 13 12 11 10 9 8
Name -- -- -- -- -- -- -- --
Default 0 0 0 0 0 0 0 0
Bit # 7 6 5 4 3 2 1 0
Name -- -- -- PISRIE -- -- RESERVED GSRIE
Default 0 0 0 0 0 0 0 0
Bit 4: Port Interrupt Status Register Interrupt Enable (PISRIE) When this is enabled and the GL.ISR. PISR
status bit is set, the INT pin will be driven low.
0 = interrupt disabled
1 = interrupt enabled
Bit 0: Global Status Register Interrupt Status Interrupt Enable (GSRIE) When this interrupt enable bit is
enabled, and the GL.ISR.GSR status bit is set, the
INT pin will be driven low.
0 = interrupt disabled
1 = interrupt enabled